| Lat / long: | 39.7911, -105.31447 |
| Primary: | Beryllium |
| Tertiary: | Feldspar, Quartz, Mica, Barium-Barite, Molybdenum, Bismuth |
| Ore: | Bismuthinite, Bismutite, Chrysoberyl, Microcline, Muscovite, Quartz |
| Orebody form: | TABULAR |
| Operation type: | Unknown |
| Production size: | None |
| Development status: | Occurrence |
| Host rock: | Idaho Springs-Mica Schist Unit |
| Host type: | Mica Schist |
| Associated rock: | Granitic Pegmatite |
| Associated type: | Pegmatite |
| Structure: | Front Range Uplift, Denver Basin, Junction Ranch Fault System, Hurricane Hill Fault System |
| Tectonic: | Central Cordillera (Southern Rocky Mtns) |
| MRDS | D010188 |
| DEP | 10013730 |
| 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:: RANDALL, J.S., 1886, MINERALS OF COLORADO: GEORGETOWN, CO, 49 P.}{Deposit:: ECKEL, E.B., 1961, MINERALS OF COLORADO-A 100-YEAR RECORD: USGS BULL. 1114, P. 77} |
| Reporter | Schwochow, Stephen D., Spanski, Gregory T. |