| Locality type: | Occurrence |
| Classification |
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| Species: | Opal |
| Formula: | SiO2 · nH2O |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Opal data |
| Locality Data: | Click here to view Unnamed Diatomite occurrence [1], Westwood, Lassen County, California, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 1007077 |
| Long-form Identifier: | 1:3:1007077:0 |
| GUID (UUID V4): | 267ef820-fdc8-4692-8c73-c818be12d012 |
| Nearest other occurrences of Opal |
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| 31.3km (19.4 miles) | ⓘSusanville, Lassen County, California, USA |
| 48.5km (30.1 miles) | ⓘLassen Peak, Lassen Volcanic National Park, Shasta County, California, USA |
| 51.1km (31.7 miles) | ⓘBrokeoff Mountain, Lassen Volcanic National Park, Shasta County, California, USA |
| 67.1km (41.7 miles) | ⓘLaura Quartz Mine, Clio, Plumas County, California, USA |
| 81.1km (50.4 miles) | ⓘStewart & Moore prospect, Shingletown, Shasta County, California, USA |
| 88.6km (55.1 miles) | ⓘGrefco Mine, Haney Mountain, Shasta County, California, USA |
| 91.5km (56.8 miles) | ⓘUnnamed Diatomite occurrence [3], Brush Mountain, Shasta County, California, USA |
| 91.7km (57.0 miles) | ⓘVenture II Mine, Haney Mountain, Shasta County, California, USA |
| 93.1km (57.9 miles) | ⓘBurney pit, Burney Spring Mountain, Shasta County, California, USA |
| 93.5km (58.1 miles) | ⓘ16 to 1 Mine (Sixteen-to-One Mine; Original Sixteen-to-One Mine), Alleghany, Alleghany Mining District (Forest Mining District), Sierra County, California, USA |
| References |
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