| Lat / long: | 39.82777, -105.31475 |
| Primary: | Beryllium |
| Tertiary: | Feldspar, Mica |
| Ore: | Chrysoberyl, Muscovite |
| Gangue: | Tourmaline |
| Orebody form: | TABULAR |
| Operation type: | Unknown |
| Production size: | None |
| Development status: | Occurrence |
| Host rock: | Idaho Springs Formation-Mica Schist Unit |
| Host type: | Mica Schist |
| Associated rock: | Granitic Pegmatite |
| Associated type: | Pegmatite |
| Structure: | Front Range Uplift, Denver Basin, Hurricane Hill Fault System, Unnamed Syncline |
| Tectonic: | Central Cordillera (Southern Rocky Mtns) |
| MRDS | D010192 |
| DEP | 10013734 |
| Reference | {Deposit:: SHERIDAN, D.M., AND OTHERS, 1967, GEOLOGY AND URANIUM DEPOSITS OF THE RALSTON BUTTES DISTRICT, JEFFERSON COUNTY, COLORADO: USGS PROF. PAPER 520 (INCL. GEOLOGIC MAP OF RALSTON BUTTES QUAD).}{Deposit:: HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-44: USGS PROF. PAPER 227, P. 85}{Deposit:: USGS COMMODITY FILE, GP III, REEL 31, DOCKET 9933; GP III, REEL 40, DOCKET 12738; GP III, REEL 12, DOCKET 2701, 1946 (FROM ORIGINAL CRIB RECORD)} |
| Reporter | Schwochow, Stephen D. |