| Lat / long: | 39.74916, -105.44087 |
| Primary: | Mica |
| Tertiary: | Beryllium |
| Ore: | Beryl, Muscovite |
| Gangue: | Albite, Biotite, Quartz, Sericite, Tourmaline |
| Orebody form: | LENTICULAR, POD |
| Discovery year: | 1875 |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Past Producer |
| First production started: | 1895 |
| Last production ended: | 1944 |
| Host rock: | Idaho Springs Formation---Biotite Gneiss |
| Host type: | Schist,Gneiss |
| Associated rock: | Pegmatite |
| Associated type: | Pegmatite |
| Structure: | Front Range Uplift, Denver Basin, Floyd Hill Fault Zone |
| Tectonic: | Central Cordillera (Southern Rocky Mtns) |
| MRDS | D010225 |
| DEP | 10013761 |
| Reference | {Deposit:: HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-44: USGS PROF. PAPER 227, P. 27-29}{Deposit:: SHERIDAN, D.M., AND MARSH, S.P., 1976, GEOLOGIC MAP OF THE SQUAW PASS QUADRANGLE, CLEAR CREEK, JEFFERSON, AND GILPIN COUNTIES, COLORADO: USGS MAP GQ-1337}{Deposit:: BOOS, M.F., 1954, GENESIS OF PRECAMBRIAN PEGMATITES IN THE DENVER MOUNTAIN PARKS AREA, COLORADO: GSA BULL., V. 65, P. 115-142} |
| Reporter | Schwochow, Stephen D. |