Columbus Mine
Past ProducerBoron-BoratesUSGS MRDS
Location
| State | California |
| County | Ventura |
| Coordinates | 34.78443, -119.06287 |
Commodities
| Primary | Boron-Borates |
| Tertiary | Gypsum-Anhydrite |
Mine Details
| Status | Past Producer |
| First Production | 1902 |
| Discovery Year | 1899 |
| Data Source | USGS MRDS |
| Source ID | 10102219 |