Keystone Mine
Past ProducerGold, Silver, Zinc, CopperUndergroundUSGS MRDS
Location
| State | California |
| County | Shasta |
| Coordinates | 40.72095, -122.51500 |
Commodities
| Primary | Gold, Silver, Zinc, Copper |
| Tertiary | Sulfur-Pyrite |
Mine Details
| Status | Past Producer |
| Type | Underground |
| First Production | 1923 |
| Discovery Year | 1900 |
| Data Source | USGS MRDS |
| Source ID | 10214011 |