Keystone Mine

The Keystone Mine is a fluorine-fluorite mine located in Custer county, Idaho at an elevation of 8,599 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Name: Keystone Mine  

State:  Idaho

County:  Custer

Elevation: 8,599 Feet (2,621 Meters)

Primary Mineral: Fluorine-Fluorite

Lat, Long: 44.4453, -114.32750

Map: View on Google Maps

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Satelite image of the Keystone Mine

Keystone Mine MRDS details

Site Name

Primary: Keystone Mine
Secondary: Greyhound


Primary: Fluorine-Fluorite
Tertiary: Copper
Tertiary: Beryllium
Tertiary: Silver
Tertiary: Lead


State: Idaho
County: Custer
District: Bayhorse District

Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Administrative Organization: Challis National Forest


Type: Patented
Type: Located Claim


Not available


Owner Name: Chambers, Arthur E.
Percent: 100.0
Home Office: Tucson, AZ
Info Year: 1976


Not available


Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Discovery Year: 1877
Discovery Method: Unknown
Years of Production:
Significant: N
Deposit Size: S


General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Salmon River Mountains

Mineral Deposit Model

Not available




Not available


Alteration Type: L


Name: Dolomite
Role: Host
Age Type: Host Rock
Age Young: Late Cambrian

Analytical Data

Not available


Ore: Fluorite
Ore: Galena
Ore: Chalcopyrite
Gangue: Quartz
Gangue: Barite
Unknown: Tetrahedrite


Comment (Location): Head of Whetstone Gulch, South of Garden Creek

Comment (Reserve-Resource): 12-76 Resource Quantity-Grade Estimate On Matrix Record She Taken From Reference Cited In 701. 12-76 Capital and Operating Costs Estimated From Reference C Record 702 With Adjustments For Size & Type of Operations Pr 12-76 Recovery of Some By-Product Silver May Be Possible But Included In the Proposed Operation Or Cost Estimates.


Reference (Deposit): Anderson, 1954, Idaho Bureau Of Mines And Geology Pamphlet 101, P. 12

Reference (Deposit): Ross, C. P., 1937, Geology And Ore Deposits Of The Bayhorse Region, Custer County, Idaho: USGS Bulletin 877, 161 P

Reference (Deposit): 1937 Geolmap Ross, C. P., Bulletin 87

Reference (Production): Ross, C. P., 1937, Geology And Ore Deposits Of The Bayhorse Region, Custer County, Idaho: USGS Bulletin 877, 161 P., P. 116

Reference (Deposit): Chambers 1966 Phd Dissertation, Univ Of Arizona, 154 P.

Reference (Deposit): McIlroy, Coffman, Rice, & Hibpshman 1974 USBM Ic 8646

Reference (Deposit): Shawe & Others 1976 USGS Prof Paper 933 P 35-38

Reference (Deposit): U.S. Bureau Of Mines Open-File Report MLA 6-91, 1991, Table A-2, No. 258, P. 168.

Idaho Gold

Where to Find Gold in Idaho

"Where to Find Gold in Idaho" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Idaho. Read more at Where to Find Gold in Idaho.