Where to Find Pyrite in South Dakota: 5 Mapped Sites
South Dakota has 5 documented sites where pyrite have been reported, and the best-known are Horseshoe - Comet Mine, Rochford, and Broken Boot Gold Mine. Every site is mapped below with GPS coordinates and links to a full report of access and what's been found there. 2 of the 5 sites are on public-access land.
Last updated: — data compiled by the Rockhounding.org Research Team · methodology
Pyrite Map: South Dakota
All 5 pyrite sites in South Dakota. Click a pin for the full site report.
Where Pyrite Are Found in South Dakota
Pyrite grows in nearly every rock type: cubes in slate and shale, balls in concretions, massive seams in ore veins. Mine dumps, black-shale roadcuts, and creek concretions all produce it.
The richest reported sites in South Dakota: Horseshoe - Comet Mine, Rochford, Broken Boot Gold Mine, Oro Fino Mine, Bion Fraction, Lehigh Claim.
Of the 5 sites, 2 are public access. Check each site report for current land status before you go.
All Pyrite Sites in South Dakota
- Horseshoe - Comet Mine — Forest Service
- Rochford — Public Access
- Broken Boot Gold Mine — Public Access
- Oro Fino Mine — Forest Service
- Bion Fraction, Lehigh Claim — Forest Service
How to Identify Pyrite
Pyrite is brassy metallic yellow with crystals as sharp cubes or 12-sided balls, faces often striated. The fool’s-gold test is simple: pyrite is hard (6–6.5) and brittle — a knife point makes it crumble to greenish-black powder — while real gold is soft, dents, and leaves a yellow streak. Pyrite is also noticeably lighter than gold.
Not sure what you found? Try our identification guide →Frequently Asked Questions
Where can I find pyrite in South Dakota?
South Dakota has 5 mapped sites where pyrite have been reported. The best-known are Horseshoe - Comet Mine, Rochford, and Broken Boot Gold Mine. Each listing on the map above includes GPS coordinates, access type, and what has been found there.
How many pyrite sites are mapped in South Dakota?
We have 5 documented pyrite sites in South Dakota, compiled from community submissions and published locality records and reviewed by the Rockhounding.org Research Team.
Is it legal to collect pyrite in South Dakota?
Casual collecting is generally allowed on BLM and National Forest land for personal, non-commercial use — the standard BLM limit is 25 lbs per day plus one specimen. National parks, monuments, and many state parks prohibit collecting, and private land always requires the owner's permission. Check the site report for each location and verify current land status before you dig.
How do I identify pyrite?
Pyrite is brassy metallic yellow with crystals as sharp cubes or 12-sided balls, faces often striated. The fool’s-gold test is simple: pyrite is hard (6–6.5) and brittle — a knife point makes it crumble to greenish-black powder — while real gold is soft, dents, and leaves a yellow streak. Pyrite is also noticeably lighter than gold.
What should I bring to collect pyrite?
The basics: a rock hammer, safety glasses, gloves, a bucket or padded bag for specimens, and a GPS app with the coordinates from this page. Add a spray bottle — wetting a stone makes color and banding far easier to judge in the field.
⚠️ Always verify current regulations, weather conditions, and access requirements before visiting any location. Information provided is based on community submissions and may not be current or accurate.
Data: USGS Mineral Resources Data System, community submissions — reviewed and approved by the Rockhounding.org Research Team. Always verify current land status, regulations, and access before visiting any site.