| Lat / long: | 38.16961, -122.68134 |
| Primary: | Gemstone |
| Operation type: | Unknown |
| Production size: | Yes |
| Development status: | Producer |
| MRDS | W024119 |
| DEP | 10110789 |
| 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 SCHOOL} |
| Reporter | Unknown |