| Lat / long: | 46.8713, -110.34472 |
| Primary: | Gemstone |
| Orebody form: | DIKE |
| Discovery year: | 1880 |
| Operation type: | Unknown |
| Production size: | Yes |
| Development status: | Producer |
| First production started: | 1895 |
| Host rock: | Madison Limestone |
| Host type: | Limestone |
| Structure: | East Flank Of Domal Uplift Little Belt Mts. |
| MRDS | W013397 |
| DEP | 10070455 |
| Reference | CLABAUGH, S. E., 1952, CORUNDUM DEPOSITS OF MONTANA: U.S. GEOLOGICAL SURVEY BULL. 983, P. 6 - 3 |
| Reporter | Berg, Richard B. (Krohn, D. H.) |