| Lat / long: | 38.16959, -122.68136 |
| Primary: | Gemstone |
| Operation type: | Surface |
| Development status: | Past Producer |
| MRDS | W024119 |
| MAS | 60410033 |
| DEP | 10115440 |
| Reference | {Deposit:: CALIF JOUR MINES AND GEOL V 51 NO 3 JULY 1955 P 259 280 PL 4}{Deposit:: GEM STONES NEPHRITE ON VONSON RANCH APPROX 1 MI SW OF UNION} |
| Reporter | Western Field Operations Center (WFOC) |