Fairfield

Fairfield is the county seat of Camas County, Idaho, sitting at the edge of the Soldier Mountains and Smoky Mountains within the Sawtooth National Forest (Fairfield Ranger District). The Idaho Department of Lands' own rockhounding page lists moonstone specifically "near Fairfield" — a credible, official state source, even though it doesn't give an exact site or road. Idaho's feldspar (mostly orthoclase, the mineral family moonstone belongs to) is documented at hundreds of locations statewide, and this region's volcanic geology (Challis Volcanics extend into the Fairfield area) is a plausible fit. Treat this as a real, state-recognized locality with an unconfirmed exact spot — worth a stop if you're in the area, but don't expect turn-by-turn directions to a specific outcrop.

Fairfield is the county seat of Camas County, Idaho, with the Soldier Mountains and Smoky Mountains (Sawtooth National Forest, Fairfield Ranger District) to the north. No specific road or trailhead for the moonstone occurrence was found.

No specific method documented. Moonstone/feldspar collecting in volcanic terrain of this type is typically surface picking of float rather than hard-rock digging, but this is general inference, not site-specific confirmation.

Land status unverified for the specific moonstone occurrence — confirm ownership and permission before visiting. The surrounding area includes Sawtooth National Forest (Fairfield Ranger District) and BLM land, both of which generally allow personal-use rock collecting, but whether the documented moonstone occurrence itself sits on public or private land wasn't confirmed. Contact the Fairfield Ranger District or Idaho Department of Lands for a more precise location before planning a trip.