Expert guides, tips, and insights to help you on your rockhounding journey.
Don't get fooled at your next gem show. 5 universal tests, 15 specific mineral fakes exposed (dyed amethyst, glass opal, fake moldavite & more), red flag seller tactics, and what to ask — 2026 guide.
Free interactive gold prospecting map with 3,037 verified U.S. locations. Top free BLM panning sites, how to identify gold in the field, gold pan vs. sluice box, and legal rules by state.
Collecting is banned inside all U.S. National Parks — but the BLM and National Forest land just outside the boundaries is often world-class. 15 park profiles with adjacent collecting sites. Updated 2026.
Browse 202 verified quartz collecting sites across the U.S. Filter by state or variety — crystals, amethyst, rose quartz, agate. GPS coords, access info & free BLM sites. Updated 2026.
New to rockhounding? This complete beginner's guide covers where to go, what tools to bring, how to identify your finds, and the rules every rockhound needs to know.
Discover what rocks are worth money, from diamonds and rubies to agates and quartz. Includes real price ranges per carat and which valuable rocks you can find yourself.
Learn how to identify minerals at home using simple tests for hardness, streak, luster, and more. No lab needed — just everyday tools and this step-by-step guide.
Discover the May birthstone emerald, its meaning, history, symbolism, and why it perfectly represents growth, love, and renewal.
Discover the April birthstone diamond, its meaning, history, formation, and where it's found. Learn everything about diamonds in this complete guide.
Discover the November birthstone---topaz and citrine. Learn their meaning, history, colors, and how to choose the perfect November birthstone for you.
Learn how to identify real quartz and avoid fake crystals. Discover 6 simple tests rock collectors use to spot genuine quartz.
Learn how to tell the difference between real and fake emeralds. Discover simple identification tests, common fake stones, and tips for buying genuine emerald gemstones.
Learn how to clean rocks and minerals at home using safe, proven methods. This guide covers everything from soap and water to oxalic acid, including how to remove iron stains, calcite coatings, and dirt from quartz, geodes, and mineral specimens.
Learn how to use a rock tumbler step by step. This beginner's guide explains rock tumbling stages, grit types, and tips for polishing rocks at home.
Not sure which rock tumbler to buy? This guide recommends the best rock tumbler to suit every need, from beginner-friendly to professional level. It also includes safety and maintenance tips for long-lasting use.
Hand polishing is one of the best ways to get polished stones. This guide covers every hand polishing method — sandpaper progression, polishing compounds by material, and how to get a true mirror finish on agate, jasper, and more.
Discover the best gems to hunt for in Kentucky, from geodes and Kentucky agate to fluorite and freshwater pearls. A beginner-friendly guide to the best spots, rules, and tips.
Cutting a thunderegg wrong destroys what's inside. Here's the full step-by-step process for cutting, sanding, and polishing a thunderegg to a glassy finish — no prior lapidary experience needed.
Everything you need to plan a trip to Crater of Diamonds State Park: how to find a diamond, the best search methods, fees, gear list, best times to visit, and what to do with your finds.
Thundereggs and geodes look almost identical on the outside. Here's how to tell them apart, how they form, what's inside, and why the distinction gets complicated even for geologists.
Thundereggs are round, lumpy rocks hiding beautiful agate, chalcedony, opal, or jasper inside. Here's what they are, how they form, what's inside, and where to find them across the US and beyond.
Field guide to gem hunting in Alabama — star blue quartz in the Piedmont region, placer gold in Talladega and Cleburne counties, geodes from the Fort Payne Formation, Sylacauga marble, and Mississippian fossils. Includes GPS coordinates, land status, tools, and legal access notes.
Field guide to gem hunting in Alaska. Covers nephrite jade in the Kobuk Valley, placer gold near Fairbanks, Nome, and Juneau, almandine garnet at Wrangell, thunder eggs on Gravina Island, and Matanuska Valley fossils. Includes GPS coordinates, land status, vehicle requirements, tools, bear safety, and legal access notes.
Arizona gem hunting — fire agate, turquoise, peridot at San Carlos, and copper minerals. BLM desert sites and fee-dig operations across the state.
Arkansas gem hunting — quartz crystals near Mount Ida, diamonds at Crater of Diamonds State Park, and novaculite. Fee-dig mines and public forest sites.
California gem hunting — tourmaline in San Diego County, jade on the Big Sur coast, gold in the Mother Lode, and desert agates. Public and fee-dig sites.
Colorado gem hunting — aquamarine at Mount Antero, topaz and amazonite at Pikes Peak, rhodochrosite, and gold. Alpine collecting and BLM desert sites.
Connecticut gem hunting guide — garnet and staurolite in western highlands schist, beryl and tourmaline from Portland pegmatites, and prehnite and zeolites in Meriden trap rock. Collecting locations, GPS coordinates, tools, and legal access.
Delaware gem hunting guide — Brandywine Creek quartz and garnet, C&D Canal Cretaceous fossils, Iron Hill serpentine, and Cape Henlopen beach stones. Honest field notes for the second-smallest state.
Field guide to gem hunting in Florida — agatized coral (state stone), shark teeth at Venice Beach, Peace River megalodon teeth and mammoth bones, calcite geodes in Ocala Limestone, and Rucks Pit specimens. Locations, GPS, tools, and legal rules.
Georgia gem hunting — rubies and sapphires at Graves Mountain, gold in Dahlonega, amethyst, and staurolite fairy crosses. Open-house events and creek sites.
Field guide to gem hunting in Hawaii covering olivine (peridot), Pele's tears, obsidian, zeolites, and black sand. Includes GPS locations, land status, legal restrictions, and cultural considerations for every site.
Idaho gem hunting — star garnets near Moscow, opal at Spencer, sapphires, and gold. Public and fee-dig collecting across the Gem State.
Illinois gem hunting guide — world-class fluorite from the Hardin County fluorspar district, Warsaw Formation geodes, Mazon Creek fossils, galena, and gravel-pit agates. Collecting locations, GPS coordinates, and field ID tips.
Indiana gem hunting guide — Keokuk geodes in south-central Indiana, glacial placer gold in Brown and Morgan counties, celestite and calcite crystals in limestone quarries, and Devonian coral fossils. Public sites, GPS coordinates, tools, and legal notes.
Iowa gem hunting guide — Keokuk geodes with quartz crystals, calcite, and pyrite from the Warsaw Formation. Prairie agates, Lake Superior agates in glacial drift, and crinoid fossils in Devonian limestone. Collecting locations, field ID, and legal access.
Kansas gem hunting guide — galena and sphalerite from the Tri-State Mining District, prairie agates in the Flint Hills, selenite crystals in Barton County, Niobrara chalk fossils, and Permian flint. Top locations, GPS, tools, and legal access.
Louisiana gem hunting — petrified palmwood (state fossil) from the Oligocene Catahoula Formation, gravel bar agates, iron concretions in Kisatchie National Forest, and salt dome cap rock minerals. A field guide for a Coastal Plain state.
Field guide to gem hunting in Maine's Oxford County pegmatite belt. GPS coordinates, land status, fees, and field ID for tourmaline, aquamarine, morganite, garnet, amethyst, and topaz.
Maryland gem hunting guide — almandine garnets in Piedmont schist, gold panning in the Maryland Gold Belt, serpentine and chromite at Soldiers Delight, Miocene fossils at Calvert Cliffs, and soapstone at Catoctin. GPS coordinates, land status, tools, and legal notes.
Massachusetts gem hunting guide — rhodonite in the western Berkshires, babingtonite at Lane Quarry, emery at Chester-Blandford State Forest, dinosaur tracks in the Connecticut River Valley, and beach collecting on Cape Cod. GPS coordinates, land status, tools, and field ID.
Michigan gem hunting field guide — Lake Superior agates, Petoskey stones, native copper, thomsonite, chlorastrolite, and pudding stone. Beach collecting, Upper Peninsula sites, GPS coordinates, land status, tools, and legal notes.
Minnesota gem hunting field guide — Lake Superior agates in glacial drift, thomsonite on the North Shore, pipestone at the national monument, and Iron Range minerals. Locations, GPS, tools, and legal access.
Mississippi gem hunting guide — petrified wood (state stone) in Cretaceous and Tertiary formations, agates on Mississippi River gravel bars, iron concretions, and Coastal Plain fossils. National Forest sites, GPS coordinates, tools, and legal access.
Missouri gem hunting field guide — mozarkite (state rock) in Benton County, Keokuk geodes, galena and calcite from the Lead Belt, barite from Washington County, and druzy quartz in the Ozarks. GPS coordinates, land status, tools, and legal notes.
Montana gem hunting guide — sapphires at Gem Mountain and Rock Creek, Montana agates along the Yellowstone, and placer gold. Fee-dig and public sites.
Nebraska gem hunting guide covering blue chalcedony, prairie agates, petrified wood, and jasper across the Pine Ridge, Oglala National Grassland, and Platte River gravels. Locations, legal access, and field ID.
Nevada gem hunting — precious opal at Virgin Valley, turquoise from historic mines, fire agate, and gold. BLM public land and fee-dig operations.
New Hampshire gem hunting guide — pegmatite minerals in the White Mountains belt. Smoky quartz, beryl, tourmaline, garnet, and topaz. Collecting locations, GPS coordinates, tools, and legal access.
Field guide to gem hunting in New Jersey — fluorescent minerals at Franklin and Sterling Hill, zeolites in Watchung trap rock, Cape May diamonds, Cretaceous amber, and magnetite. GPS coordinates, land status, tools, and legal notes.
New Mexico gem hunting — turquoise at Cerrillos, peridot at Kilbourne Hole, fire agate, and Rockhound State Park thundereggs. Public and historic sites.
Field guide to gem hunting in New York — Herkimer diamonds, Adirondack garnets, Gore Mountain garnet, labradorite, tourmaline, wollastonite, Devonian fossils, and Manhattan schist garnets. Locations, GPS, tools, and legal access.
North Carolina gem hunting guide — rubies and sapphires in Franklin, emeralds in Hiddenite, and aquamarine in Spruce Pine. Fee-dig mines, public sites, GPS coordinates, and what to bring.
North Dakota gem hunting field guide — Knife River flint, prairie agates, petrified wood, selenite crystals, and cannonball concretions. Collecting locations with GPS coordinates, land status, and access details for Dunn, Mercer, Billings, and Slope counties.
Ohio gem hunting field guide — Flint Ridge multicolored flint (state gem), celestite crystals at Put-in-Bay, Herkimer-type quartz in dolomite, Ordovician fossils near Cincinnati, and Wayne National Forest surface collecting. GPS coords, land status, tools, and legal notes.
Oklahoma gem hunting field guide — hourglass selenite at Salt Plains NWR, barite roses in central OK, galena and sphalerite in the Tri-State Mining District, selenite mesas in the Glass Mountains, and petrified wood in eastern Oklahoma. GPS coordinates, land status, tools, and legal notes.
Oregon gem hunting — sunstone at Plush, thundereggs near Madras, fire opal, and agate. Fee-dig mines and BLM public land collecting sites.
Field guide to gem hunting in Pennsylvania. Covers sunstone feldspar in Delaware County, garnets at French Creek, amethyst, celestite, zinc minerals at Lehigh Gap, gold panning in York County, and coal region pyrite. Land status, GPS coordinates, tools, and legal rules.
Rhode Island gem hunting guide — cumberlandite (state rock), quartz and serpentine from the Narragansett Basin, beach-tumbled jasper, and Westerly granite. GPS coordinates, land status, and what to bring.
Field guide to gem hunting in South Carolina. Gold panning in the Piedmont, amethyst from Abbeville County pegmatites, beryl in Anderson County, staurolite, shark teeth, and legal collecting rules.
South Dakota gem hunting — Fairburn agates, rose quartz, Black Hills pegmatite gems, and gold. National Forest and BLM collecting across the state.
Tennessee gem hunting — freshwater pearls, paint rock agate, Tennessee marble, and gold panning. Creek collecting and the Cumberland Plateau.
Texas gem hunting — blue topaz in Mason County, agate at Woodward Ranch, turquoise in West Texas, and Llano uplift minerals. Ranch access and BLM sites.
Utah gem hunting — topaz at Topaz Mountain, red beryl in the Wah Wahs, variscite at Clay Canyon, and labradorite. All on BLM public land.
Vermont gem hunting field guide — almandine garnets in mica schist, Vermont Verde Antique serpentine marble, talc and soapstone deposits, staurolite fairy crosses near Stowe. Collecting sites, GPS coords, tools, and legal access.
Virginia gem hunting guide — amazonite at Morefield Mine, unakite, fairy cross staurolite, gold panning in the Piedmont, and Blue Ridge garnets. Fee-dig mines, National Forest sites, GPS coordinates, and field ID tips.
Washington state gem hunting — Ellensburg blue agates, nephrite jade, gold panning, and petrified wood. Public land and river collecting sites.
West Virginia gem hunting guide — quartz crystals from Appalachian road cuts and stream beds, gold panning in the eastern panhandle, Devonian fossils, and coal-region minerals. National Forest access, GPS coordinates, tools, and legal notes.
Wisconsin gem hunting field guide — Lake Superior agates on northern beaches, glacial placer gold in Taylor and Rusk counties, galena in the lead-zinc district, Mississippi River geodes, Driftless Area fossils, and pudding stone in glacial till. GPS coordinates, land status, tools, and legal notes.
Wyoming gem hunting — nephrite jade, sapphires, Sweetwater agates, and gold. BLM public land collecting across the Cowboy State.
Start a rock and mineral collection the right way. How to find, identify, label, store, and display specimens. Free locations and tools for new collectors.
Fee-dig gem mines across the US where you keep what you find. Sapphires, diamonds, emeralds, opals — prices, what to expect, and which mines are worth the trip.
Every tool you need for rockhounding — from surface collecting to hard-rock mining. Rock hammers, chisels, screens, UV lights, and field gear rated by use case.
A field geologist's guide to finding agates across the United States, covering top collecting areas in Oregon, Montana, Minnesota, Michigan, Arizona, Wyoming, California, and Texas with GPS coordinates, land status, vehicle requirements, specimen tables, and field identification tips.
Find amethyst in Arizona, Georgia, South Carolina, Maine, and 10+ more states. GPS coordinates, public land access, fee-dig mines, and field ID tips. Free interactive specimen map included.
Find aquamarine at Mount Antero in Colorado, North Carolina pegmatites, Maine quarries, and Idaho backcountry. GPS coordinates, altitude gear lists, pegmatite extraction tips, and how to tell aquamarine from blue topaz. Free interactive map included.
Find carnelian on Oregon and Washington beaches, in California desert gravels, Arizona BLM land, and Great Lakes shorelines. GPS coordinates, beach collecting tips, and how to tell carnelian from jasper. Free interactive map included.
Find chalcedony, agate, and blue chalcedony across 6+ US states. GPS coordinates, BLM land access, volcanic collecting sites, and field ID tips to tell chalcedony from opal and jasper. Free interactive map included.
Find natural citrine in Colorado, North Carolina, Arkansas, and California. Learn to tell real citrine from heat-treated amethyst. GPS coordinates, pegmatite access, and fee-dig sites. Free interactive map included.
A field geologist's guide to finding native copper specimens across the United States, covering Michigan's Keweenaw Peninsula, Arizona copper districts, New Mexico, and Montana with GPS coordinates, land status, vehicle requirements, and field identification tips.
A field geologist's guide to finding flint and chert across the United States, covering top collecting areas in Ohio, Texas, Kansas, Kentucky, Georgia, and the Midwest with GPS coordinates, land status, vehicle requirements, specimen tables, and field identification tips.
A field geologist's guide to finding fluorite across the United States, covering the Illinois-Kentucky Fluorspar District, New Mexico, Colorado, Tennessee, and New Hampshire with GPS coordinates, land status, specimen details, and field identification tips.
A field geologist's guide to finding fossils across the United States, covering top collecting areas in Ohio, Florida, South Dakota, Texas, Maryland, Montana, and California with GPS coordinates, land status, vehicle requirements, specimen tables, and legal regulations.
A field geologist's guide to finding garnets across the United States, covering Idaho star garnets, New York's Gore Mountain, North Carolina's Cowee Valley, Montana, and Alaska with GPS coordinates, land status, vehicle requirements, and field identification tips.
Field guide to Alabama geode hunting in the Fort Payne Formation. Quartz and calcite geodes in Cherokee, DeKalb, and Blount county creeks. GPS locations, access info, specimens, and collecting rules.
Alaska has no documented geode localities. The state's geology — accreted terranes, volcanic arcs, and glacial deposits — does not produce accessible geodes. Here is what Alaska does offer mineral collectors, from jade to gold to garnet.
Arizona geode hunting at Saddle Mountain, Kofa Mountains, and BLM desert sites near Quartzsite. Quartz and chalcedony geodes in volcanic rhyolite terrain with GPS coordinates, land status, and desert safety tips.
Arkansas produces quartz crystal pockets and creek geodes in the Ouachita Mountains. Mount Ida fee-dig mines, National Forest collecting, and GPS locations for crystal hunting.
California's Hauser Geode Beds, Wiley Well, and Cinnamon Mine area produce quartz and chalcedony geodes on open BLM land. GPS coordinates, desert collecting tips, and access details.
Colorado crystal hunting — alpine pegmatite pockets with amazonite, smoky quartz, and aquamarine plus volcanic thundereggs in the San Juan Mountains. GPS coordinates, access info, and high-altitude collecting tips.
Connecticut does not produce true geodes, but the state's pegmatites and trap rock formations yield crystal-lined vugs with tourmaline, beryl, garnet, zeolites, and prehnite. Here is where to look and what to expect.
Delaware has no geode deposits anywhere in the state. The Coastal Plain geology lacks the bedrock formations that produce geodes. Here is what Delaware does offer collectors — fossils, beach stones, and Brandywine Creek Piedmont minerals.
A field guide to Florida's geode alternatives including agatized coral near Tampa Bay, calcite crystal clams at Fort Drum, and fossil-rich river sites with GPS coordinates, specimen types, access details, and collecting regulations.
Georgia geode and crystal hunting at Graves Mountain open-house events, Piedmont creek sites, and Blue Ridge quartz veins. Rutile, lazulite, kyanite, and quartz crystal pockets in metamorphic rock.
Hawaii does not produce true geodes. What the volcanic islands offer instead — olivine, zeolites in basalt vesicles, volcanic glass, and beach minerals. Collecting rules, cultural considerations, and alternatives.
Field guide to Idaho thunderegg and geode collecting at Graveyard Point, Spencer Opal Mines, and Challis volcanic areas. BLM public land access, GPS coordinates, specimens, tools, and collecting rules.
Western Illinois produces world-class Keokuk geodes from the Warsaw Formation. Hamilton, Nauvoo, and Adams County creek collecting with GPS, access info, and specimen details.
A field guide to finding geodes in southern Indiana creek beds, road cuts, and Hoosier National Forest land with GPS coordinates, formation geology, specimen types, and collecting regulations.
Iowa is the undisputed geode capital of the United States. This field guide covers Keokuk geodes from the Warsaw Formation, with GPS coordinates for the best creek sites in Lee, Henry, and Van Buren counties, specimen data, legal access notes, and collecting techniques.
Field guide to Kansas geode hunting in southeastern creeks, Flint Hills chert beds, and Smoky Hills concretions. Quartz, calcite, celestine, and selenite geodes with GPS, access info, and collecting tips.
Kentucky geode hunting in Estill, Powell, and Breckinridge counties. Quartz, calcite, and celestite geodes from the Fort Payne and Warsaw formations along creeks in Daniel Boone National Forest and public waterways.
Louisiana does not produce native geodes. The state's deltaic and Coastal Plain geology lacks geode-forming bedrock. Northern gravel pits yield transported specimens, and petrified palmwood is the real collecting draw.
Maine does not produce classical geodes, but the Oxford County pegmatite belt yields crystal-lined pockets with tourmaline, beryl, quartz, and feldspar. Fee-dig mines, GPS locations, and collecting tips for New England's best crystal hunting.
Field guide to Maryland geode hunting in western Allegany and Garrett counties, plus Piedmont quartz sites. Devonian limestone geodes, calcite vugs, Green Ridge State Forest access, and collecting rules.
Massachusetts does not produce true geodes. The state's metamorphic and igneous geology creates quartz vugs, pegmatite pockets, and glacially transported specimens instead. Here is what to look for and where.
Michigan produces Petoskey stones, Lake Superior agates, and crystal-lined vugs in Upper Peninsula basalt. Beach collecting tips, GPS locations, and access info.
A field guide to finding Lake Superior agates, small geodes, and crystal-bearing nodules across Minnesota with GPS coordinates for North Shore beaches, Driftless Area creek beds, and glacial gravel pits with access details and collecting regulations.
Mississippi produces small quartz and calcite geodes only in the extreme northeast corner (Tishomingo County), where Paleozoic bedrock is exposed. The rest of the state is Coastal Plain sediment with no geode potential. Here is where to look and what to expect.
Missouri geode hunting along the Mississippi in Clark and Lewis counties and across the Ozark Plateau. Quartz, calcite, and rare millerite geodes from the Warsaw Formation, plus chert-shell geodes from Ozark creek gravel.
Field guide to Montana agate and geode collecting along the Yellowstone River and in volcanic terrain. Montana moss agates, quartz geodes, thundereggs, GPS locations, BLM access, and collecting rules.
Nebraska geode and agate hunting on the Oglala National Grassland and Pine Ridge badlands. Chalcedony nodules, agate geodes, and petrified wood from Tertiary volcanic ash formations. GPS locations and access.
Nevada geode hunting on BLM public land across the Basin and Range. Virgin Valley thundereggs, Garfield Hills quartz geodes, Black Rock Desert chalcedony, and southern Nevada volcanic sites. GPS locations, access, and gear.
New Hampshire does not produce classic sedimentary geodes, but its pegmatite pockets and granite vugs yield smoky quartz, beryl, feldspar, and garnet. Where to collect in the White Mountains and Grafton County.
New Jersey's Watchung basalt and Palisades diabase produce world-class zeolite-filled vugs — prehnite, datolite, stilbite, and apophyllite. Quarry access and collecting info.
New Mexico geode hunting at Rockhound State Park near Deming, BLM desert sites, and Kilbourne Hole. Thundereggs, quartz geodes, and agate in volcanic terrain with GPS coordinates, fees, and collecting limits.
A field guide to finding geodes and crystal-lined vugs in New York State, from world-class Herkimer diamond mines to Hudson Valley calcite pockets and Adirondack garnet sites with GPS coordinates and access details.
North Carolina produces crystal-lined pegmatite pockets, quartz vugs, and fee-dig gem mine specimens across the Piedmont and Blue Ridge. GPS locations, access, and collecting details.
Field guide to North Dakota geode and agate hunting in the western Badlands. Chalcedony geodes, petrified wood, Knife River flint, and cannonball concretions on National Grassland and BLM land with GPS and access info.
A field guide to finding geodes and crystal-bearing nodules in Ohio, from world-class celestite geodes at Put-in-Bay to quartz geodes in Wayne National Forest and Flint Ridge chert with GPS coordinates and access info.
A field guide to finding geodes, selenite crystals, and crystal-lined vugs across Oklahoma's geological provinces with GPS coordinates for Glass Mountains, Ouachita Mountains, Arbuckle Mountains, and Ozark Plateau collecting sites.
Oregon thundereggs — the state rock — at Richardson's Rock Ranch, Priday Beds, Ochoco National Forest, and Succor Creek. Fee-dig and public collecting sites with GPS coordinates, access info, and cutting tips.
Field guide to Pennsylvania crystal and geode collecting in quarries, limestone road cuts, and creek exposures. Calcite vugs, quartz geodes, celestite, and zeolites across the Ridge and Valley and Piedmont provinces.
Rhode Island has no true geode localities. The state's metamorphic bedrock lacks the volcanic or carbonate formations that produce geodes. Here is what you can find instead — quartz vugs, cumberlandite, beach specimens, and the best alternative mineral collecting sites.
South Carolina produces limited geodes from the Piedmont's metamorphic quartz veins and the Carolina Slate Belt. Creek collecting for quartz vugs, agates, and crystal specimens in Chesterfield, Oconee, and Kershaw counties.
South Dakota geode and agate hunting in the Black Hills, Badlands region, and western prairie. Fairburn agates, pegmatite crystal pockets, and chalcedony geodes with GPS and access info.
A field guide to finding geodes in Tennessee's Highland Rim limestone belt with GPS coordinates for collecting sites in Overton, Putnam, DeKalb, and White counties, specimen types, tools, and legal access information.
Texas geode hunting in Big Bend's volcanic Trans-Pecos, the Edwards Plateau Hill Country, and South Texas ranch land. Quartz and agate geodes with GPS coordinates, fee-dig sites, and collecting regulations.
Utah's Dugway Geode Beds in Juab County are among the most accessible geode sites in the western US — free BLM land, no permits, and quartz-lined geodes on the surface. This field guide includes GPS coordinates, driving directions from Delta, additional sites in Millard and Iron counties, specimen data, gear lists, and desert safety notes.
Vermont does not produce true geodes. The state's metamorphic geology — marble, schist, and gneiss — creates calcite vugs and quartz pockets instead. Here is where to look and what to realistically expect.
Virginia geode hunting in the Valley and Ridge limestone, Blue Ridge quartz vugs, and Piedmont pegmatite pockets. Morefield Mine, Shenandoah Valley creeks, and George Washington National Forest access.
Washington state produces thundereggs and basalt-hosted geodes from the Columbia River Basalt Group. Walker Valley thundereggs, Saddle Mountain agates, and collecting access details.
West Virginia geode hunting in Greenbrier Limestone creek beds and the Monongahela National Forest. Quartz and calcite geodes from Mississippian formations, plus collecting access and GPS locations.
A field guide to finding geodes and crystal-lined vugs in Wisconsin's Driftless Area, from Galena Dolomite vugs along the Mississippi River bluffs to quarry calcite specimens with GPS coordinates, access details, and collecting regulations.
Field guide to Wyoming geode and agate hunting on BLM public land. Sweetwater agates, thundereggs near Riverton and Thermopolis, GPS coordinates, collecting rules, and gear recommendations.
A field geologist's guide to finding jade (nephrite and jadeite) across the United States, covering top collecting areas in Wyoming, California, Washington, Alaska, Oregon, and Montana with GPS coordinates, land status, vehicle requirements, specimen tables, and field identification tips.
A field geologist's guide to finding jasper across the United States, covering Oregon's Biggs and Owyhee jasper, California's Mojave Desert, Idaho's Bruneau Canyon, and Arizona collecting areas with GPS coordinates, land status, vehicle requirements, and field identification tips.
Find labradorite and Oregon sunstone across the US. GPS coordinates for BLM collecting areas, Adirondack anorthosite road cuts, and Utah sunstone deposits. Field ID tips and free interactive map included.
A field geologist's guide to finding malachite across the United States, covering top collecting areas in Arizona, Utah, New Mexico, Tennessee, Michigan, and Nevada with GPS coordinates, land status, vehicle requirements, specimen tables, and field identification tips.
A field geologist's guide to finding moonstone across the United States, covering pegmatite localities in Virginia, New Mexico, North Carolina, and Pennsylvania with GPS coordinates, land status, vehicle requirements, specimen details, and field identification tips.
A field geologist's guide to finding opal across the United States, covering Nevada's Virgin Valley, Oregon's Opal Butte, Idaho's Spencer area, and Louisiana's opalized wood with GPS coordinates, land status, vehicle requirements, and field identification tips.
A field geologist's guide to finding peridot and olivine across the United States, covering Arizona's San Carlos area, New Mexico's Kilbourne Hole, Hawaii, and other volcanic localities with GPS coordinates, land status, vehicle requirements, and field identification tips.
A field geologist's guide to finding petrified wood across the United States, covering top collecting areas in Arizona, Washington, Oregon, Texas, Mississippi, Nevada, and Montana with GPS coordinates, land status, vehicle requirements, specimen tables, and field identification tips.
Find pyrite cubes in Colorado mine dumps, Illinois pyrite suns, Arizona copper districts, and Virginia gold belt prospects. GPS coordinates, mine dump collecting tips, and the definitive pyrite-vs-gold field test. Free interactive map included.
A field geologist's guide to finding quartz crystals across the United States, covering top collecting areas in Arkansas, New York, Colorado, North Carolina, Arizona, and Virginia with GPS coordinates, land status, vehicle requirements, specimen tables, and field identification tips.
Find sapphires at Montana gravel deposits, North Carolina fee-dig mines, and Idaho backcountry sites. GPS coordinates, land status, gravel screening tips, and how to identify raw sapphire. Free interactive map included.
A field geologist's guide to finding topaz across the United States, covering Utah's Topaz Mountain, Texas Mason County, Colorado's Pikes Peak region, and New Hampshire pegmatites with GPS coordinates, land status, vehicle requirements, and field identification tips.
Find tourmaline at California's Himalaya Mine, Maine's pegmatite quarries, Connecticut collecting sites, and North Carolina fee-digs. GPS coordinates, pegmatite mining tips, and how to identify tourmaline by its triangular cross-section. Free interactive map included.
Find turquoise in Nevada, Arizona, New Mexico, and Colorado. Active mines open to collectors, BLM land sites, GPS coordinates, and how to tell real turquoise from dyed howlite. Free interactive map.
Discover the best rocks for kids to collect, plus safe beginner locations, easy finds, and fun rockhounding tips for families.
Discover the March birthstone, including aquamarine and bloodstone meaning, color, history, symbolism, and jewelry ideas.
Learn how to rockhound with kids from scratch — what gear to pack, where to look, safety rules, and tips to keep children engaged on the hunt. Your family's first rockhounding adventure starts here.
Discover the best kid-friendly rockhounding spots in the U.S., including beaches, crystal mines, and fossil rivers perfect for beginners.
Learn how to use a Dremel tool to cut and polish rocks safely. Step-by-step guide with the best bits, speeds, safety tips, and polishing techniques.
Learn how to open a geode safely at home using simple tools. Step-by-step methods, safety tips, and expert advice to reveal hidden crystals.
Discover simple and safe ways to display rocks and minerals. From display cases to jars, learn how to protect and showcase your rock collection beautifully.
Planning beach rockhounding in 2026? Learn how king tides expose rare rocks, fossils, and gems, plus the best dates, locations, and safety tips.
Discover the 12 hottest TikTok trends for rockhounding creators in 2026. Learn how to create viral crystal, mineral, and gemstone videos that engage viewers, grow your following, and boost monetization.
Here's how to find geodes in Colorado in 2026. Discover the best geode hunting locations, identification tips, tools, and legal rules in this complete rockhounding guide.
Explore the best gemstones for jewelry. Learn about popular stones, durability, hardness, care tips, and how to choose the perfect gemstone for rings, necklaces, and more.
Discover the January birthstone garnet — its meaning, healing powers, colors, origins, where to find natural garnet, and how to wear it in jewelry.
Learn today's gold and silver prices, how precious metal prices work, and where to find gold and silver while rockhounding.
Discover the top national parks for rock collecting in 2026. Explore parks where rockhounding is permitted, uncover treasures like quartz and agates, and plan your next adventure with safety tips, permits, and FAQs included!
Explore the 2026 Gansu gold rush! Learn to identify Yumen gold, find Gobi Eye Stones, and discover the "7 Treasures" of Lanzhou. Essential legal & safety tips for rockhounds.
We tested the top rock ID apps for accuracy, offline use, and ease of use. Best for iPhone: RockHunt. Best free: Stone Identifier. Best for Android: Stone ID. Updated April 2026.
Unearth hidden treasures with the best gem mining bags of 2026! Compare top-rated kits for kids & adults, where to buy, and expert digging tips. Start your adventure today!
Explore the most complete 2025-2026 calendar of rock, gem, and mineral shows in the U.S. and worldwide. Find upcoming expos, locations, and what to expect—perfect for collectors, jewelers, and gem enthusiasts.
Discover the types of rocks that contain gold, from quartz veins to placer deposits. Learn how to identify gold-bearing rocks and where to find them.
Explore 10 of the world's most beautiful pink gemstones. Learn their meaning, care tips, and where to find them on your next gem hunting adventure.
Discover the meanings, origins, and rockhounding tips for August's 3 birthstones—Peridot, Spinel & Sardonyx—in this complete gem hunter's guide.
Green aventurine is more than a sparkly green stone—it's a symbol of luck, growth, and opportunity. Discover its meaning, where to find it, and how to identify and use it.
Discover everything about the July birthstone—ruby. Learn why rubies are rarer than diamonds, what they symbolize, and where you can legally dig for them in the U.S.
Want to collect black obsidian? Discover the 10 best U.S. locations to legally find obsidian, how to identify it, and tips for safe collecting and use.
Learn about the three August birthstones—peridot, spinel, and sardonyx. Discover their meanings, colors, where to find them, and rockhounding tips.
Discover 20 stunning yellow gemstones—from yellow sapphire and citrine to rare collector stones like legrandite. Learn how to assess quality, durability, and which yellow colored gems are best for jewelry, rockhounding, and collecting.
Tell real turquoise from dyed howlite and reconstituted stone. Color types, matrix patterns, hardness testing, and grading by mine origin. Field-tested tips for collectors.
Discover the three beautiful birthstones for June—pearl, alexandrite, and moonstone. Learn about their colors, meanings, rarity, and how to choose the best gem for yourself or a loved one.
What is the September birthstone? Discover everything about sapphire—its meaning, stunning colors, where it's found, and why it's a powerful gem for September birthdays.
Discover the legend of wishing stones, their spiritual meaning, and where to find rocks with stripes believed to bring luck, protection, and wish fulfillment.
Explore a comprehensive guide to blue gemstones including Sapphire, Aquamarine, Blue Topaz, and more. Learn about their colors, properties, Mohs hardness, locations, and value.
Discover what the birthstone for October is. Learn the meaning, color, and origin of opal and pink tourmaline—the two stunning October birthstones.
Discover 15 stunning green gemstones, from durable everyday stones to rare collector's treasures. Learn about value, color, durability, and more.
Curious about gem mining or gold panning? Learn the key differences, pros, cons, and which treasure-hunting hobby is best for you in this easy guide.
Discover the February birthstone, amethyst—its meaning, history, spiritual powers, and where you can find stunning purple crystals in the wild.
Discover the meaning, colors, and locations of December birthstones: blue topaz, blue zircon, tanzanite, and turquoise. Learn what makes each December stone special, where they're found, and how to dig for your own gemstones.
Looking to go gem mining? Discover the best public gem mines in the U.S. where you can legally dig for crystals, gems, and rocks. Family-friendly, fun, and educational—find crystal mines near you and start hunting for treasures today!
Planning a visit to the Herkimer Diamond Mines in New York? Discover everything you need to know, from mining tips and attractions to pro advice for a sparkling adventure!
Start gem mining with this beginner-friendly guide. Covers fee-dig sites, public land collecting, essential tools, and how to identify finds. Includes links to interactive maps.
Discover the best gem mining tools for rockhounding adventures. Learn what you need, where to buy them, and expert tips to make your mining trip successful!
Ruby ($100–$15,000+/ct), red beryl, Montana sapphire, Herkimer diamond & 47 more — with field ID notes, 3-tier value ranges, accessibility ratings, and GPS collecting sites. Updated 2026.
Learn all about beryl gemstones, including emeralds, aquamarines, and morganites. Discover where to find beryl, how to value it, and expert tips on gemstone care and rockhounding adventures.
Discover the best Herkimer Diamond mines in New York! Learn tips, find locations, and uncover sparkling gems with this guide. Plan your mining adventure today!
Discover the fascinating world of infinite stones: learn about their properties, uses, healing benefits, and how to source them ethically.
Discover the magic of lapidary arts this winter! Learn beginner-friendly techniques for cutting, shaping, and polishing stones at home.
Discover easy rock cleaning techniques and learn how to polish rocks at home this winter. From basic tools to expert tips, uncover the secrets to making your rock collection shine!
Keep your rockhounding skills sharp this winter with 5 easy indoor rock identification projects! Perfect for all rockhounds.
Discover the unique features of Lapis Lazuli and other blue gemstones like Sapphire, Aquamarine, and Blue Topaz. Learn how to choose the perfect gem!
Looking for affordable crystals? Discover practical tips to find local crystal shops or shop online at budget-friendly prices. Start your crystal hunt today!
Explore the fascinating world of black crystals in nature with our comprehensive guide. Discover the 20 most common black crystals, their properties, uses, origins, and how to care for them. Perfect for rockhounders, geologists, and crystal enthusiasts.
Embark on an unforgettable gem hunting adventure! Discover the top 10 gemstone mines in the US, where you can uncover diamonds, sapphires, emeralds, and more. Perfect for rockhounds, geologists, and crystal enthusiasts.
How pseudomorphism creates tiger's eye chatoyancy. Real vs. fake identification guide. All varieties — golden, red, hawk's eye, tiger iron. Where it forms and what it's worth.
Discover the comprehensive guide on gypsum, covering its properties, types, geological formation, extraction, processing, and diverse applications. Learn about the historical significance, modern innovations, environmental impact, and future trends of this versatile mineral.
Hag stones (holey stones, witch stones, adder stones) form naturally on beaches and riverbeds. Where to find them, how they form, how to tell real from drilled fakes, and their folklore history.
Discover where to find gold near you with our comprehensive guide covering popular gold prospecting locations, geological indicators, essential tools, proven techniques, and important regulations for successful gold prospecting in the United States.
Discover tips for collecting and buying rose quartz, including how to identify authentic stones, where to buy them, and how to care for them.
Discover the ultimate guide to rockhounding in Hoboken, USA. Explore geological history, popular rockhounding sites, types of rocks and minerals, tools, safety tips, and more.
Discover everything you need to know about Citrine in this comprehensive guide. Explore its history, properties, types, sources, and uses, and learn how to buy and care for Citrine.
Explore the exciting world of urban rockhounding and discover hidden crystals and minerals in the concrete jungles of the US. Learn about the best urban rockhounding locations, essential tools, techniques, safety considerations, and the vibrant community of urban rockhounders.
Explore a simple step-by-step guide to cleaning different raw crystals at home. From choosing the right tools and materials to cleaning techniques, this comprehensive article provides detailed insights into effective crystal cleaning techniques and maintenance.
Embark on a global journey to discover the world's most captivating opal hotspots. Learn about their geological origins, unique opal varieties, mining opportunities, and responsible tourism practices.
Discover the geological wonders of South Padre Island and Cameron County. Explore rockhounding opportunities, unique formations, and the fascinating history of this barrier island paradise.
Unlock all you need to know about Onyx! From identification tips and collecting advice to historical significance, value assessment, and ethical sourcing.
Free printable Mohs hardness chart. Test minerals with household objects — fingernail (2.5), penny (3.5), knife (5.5). Complete list of 60+ minerals by hardness. Rockhounding field guide included.
Unlock the mysteries of jade! This ultimate guide explores jadeite and nephrite, how to identify real jade, its value, colors, cultural significance, and investment potential.
Discover the captivating world of amethyst! Explore its meanings, uses in jewelry and healing, geological formation, and how to identify genuine amethyst. A comprehensive guide for collectors and enthusiasts.
Explore the diverse world of quartz in this comprehensive guide. Discover its mesmerizing varieties, vibrant colors, fascinating history, geological origins, and countless uses in jewelry, technology, and healing practices.
Browse 113 verified geode-hunting spots across the U.S., filterable by state. GPS coordinates, access status, and field ID tips for beginners and collectors. Free map.
Explore the world of silver treasures! Discover silver rocks, minerals, gems, and crystals. Learn how to identify them, where to find them in the US, and their fascinating uses.
Discover the best rockhounding sites near you! Our comprehensive guide covers where to find rocks, minerals, fossils, and gemstones in your backyard - locations, tips, and responsible collecting practices.
Discover the thrill of unearthing gemstones! This comprehensive guide covers everything you need to know about gem hunting in the US - where to find gems, essential tools, identification tips, and resources to plan your next rockhounding adventure!
Unravel the mysteries of hematite and black tourmaline! This comprehensive guide explores their properties, origins, uses, and helps you choose the perfect black stone for your needs.
Unveiling the beauty and power of Jasper Stone! Explore its colors, history, varieties, & how to choose, cleanse & use your Jasper for well-being & manifestation.
Unveiling the magic of Herkimer Diamonds! Explore their geology, history, significance, and how to find your own sparkling treasures in Herkimer County, New York.
Uncover the unique origins, properties, and cultural significance of emerald and malachite. Explore their value, care, and distinct allure in the world of gemstones.
Unveiling the secrets of Copperas Mountain, Ohio! Explore this hidden gem with a guide to fossils, minerals, geology, and responsible exploration.
Explore the captivating world of Chert rocks! Discover their formation, diverse varieties like jasper and agate, historical significance as tools, and beyond.
Discover the best rock hammers for rockhounding, learn about their uses, and get expert tips on maintenance and care. Find the perfect hammer for your geology adventures.
Learn how to find, identify, and collect agates in the US. Discover the joys of this fascinating hobby and the beauty of these unique stones.
Learn how to choose the best rocks for tumbling with this simple and practical method. Discover the types, sources, and preparation of rocks for tumbling.
Discover the rarest and most beautiful gemstones on Earth, their origins, properties, and meanings. Learn why these gemstones are so valuable and how to appreciate them.
Learn how to understand rock weight and the factors that influence it, such as density, porosity, water content, and pressure, in this comprehensive guide.
A comprehensive guide to the diverse world of crystal purple gemstones. Learn about the appearance, origin, properties, meanings, and uses of different types of purple gemstones.
Identify red rocks in the field — red jasper, garnet, ruby, rhodonite, red sandstone, fire agate & more. What makes rocks red, how to tell them apart, and the best U.S. collecting sites.
The best gem hunting locations in the United States. Public BLM land, fee-dig mines, and free collecting sites with GPS coordinates and access details.
Learn how to use a rock tumbler, what kind of rocks to choose, and what steps to follow to achieve the best results in rock tumbling and polishing.
Rockhounding is a fun and educational hobby that involves collecting rocks and gems. Learn how to find and join the best rockhounding clubs in the USA and enjoy the benefits of this amazing activity.
Looking for some rockhounding gift ideas for the holiday season? Here are some of the best gifts for rockhounds of all ages and levels of experience.
Discover the joy of indoor rockhounding activities this winter with our guide to 10 amazing projects. From crystal growing to DIY crafts, explore the world of rocks from the comfort of your home.
How to Choose the Best Rockhounding Tools for Winter: A Complete Guide for Beginners. Learn what tools and equipment you need to collect, identify, and clean rocks and minerals in the cold season.
Learn how to stay safe and enjoy rockhounding in winter with this complete guide. Find out the best places, tools, and techniques for winter rockhounding.
Discover the best places to go rockhounding with your family in the US. Learn what types of rocks, crystals, and minerals you can find and how to identify them. Plus, get some rockhounding tips and tricks to make your trips more fun and successful.
Browse 1,000+ verified rockhounding spots across all 50 states. Free BLM land, paid dig sites, GPS coordinates — find exactly where to go near you. Updated 2026.
Master the art of rock and mineral identification with this comprehensive guide. Learn essential techniques, physical properties, identification tools, and step-by-step processes to confidently identify minerals and rocks in the field.
Essential rockhounding tools for beginners. Rock hammers, chisels, safety gear, and field tools — what to buy, what to skip, and recommended products.
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