| Location: | Contra Costa County, California, United States, North America |
| Lat / long: | 37.86713, -121.66214 |
| dep_id: | 10076511 |
| mrds_id: | W023548 |
| Commodity type: | metallic |
| Major mineral: | Silica |
| Operation type: | Unknown |
| Production size: | Production occurred |
| Development status: | Producer |
| Reporter: | Unknown |
| References: |
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