| Locality type: | Occurrence |
| Classification |
|---|
|
| Species: | Opal |
| Formula: | SiO2 · nH2O |
| Comments: | Occurs as hollow pseudomorphs after rosenhahnite. |
| Confirmation |
|---|
|
| Validity: | Believed Valid |
| Data |
|---|
|
| Mineral Data: | Click here to view Opal data |
| Locality Data: | Click here to view Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA |
| Data Identifiers |
|---|
|
| Mindat Occurrence Record ID: | 647039 |
| Long-form Identifier: | 1:3:647039:5 |
| GUID (UUID V4): | 89e44967-21eb-43c2-bf09-b49dd1616465 |
| Nearest other occurrences of Opal |
|---|
|
|
| 10.7km (6.6 miles) | ⓘLivermore Quicksilver Mine, Cloverdale, West Mayacmas Mining District, Sonoma County, California, USA |
| 22.9km (14.2 miles) | ⓘThe Geysers, West Mayacmas Mining District, Sonoma County, California, USA |
| 28.3km (17.6 miles) | ⓘSocrates Mine, Castle Rock Springs area, West Mayacmas Mining District, Sonoma County, California, USA |
| 32.1km (20.0 miles) | ⓘJumbo Mine (B & M Mine; Double Star Mine), Castle Rock Springs area, West Mayacmas Mining District, Sonoma County, California, USA |
| 33.9km (21.0 miles) | ⓘHelen Mine (Helen Mine group; Dead Broke Mine; American Mine), Castle Rock Springs, East Mayacmas Mining District, Lake County, California, USA |
| 35.3km (22.0 miles) | ⓘSulphur Bank Mine (Sulfur Bank Mine; Sulphur Bank deposits), Clear Lake Oaks, Sulphur Creek Mining District (Sulfur Creek Mining District; Wilbur Springs Mining District), Lake County, California, USA |
| 38.3km (23.8 miles) | ⓘGreat Eastern and Mount Jackson Mine, Guerneville, Guerneville Mining District, Coast Range, Sonoma County, California, USA |
| 39.7km (24.7 miles) | ⓘGreat Western Mine (Laguna Western; Black Bart Mine; Tucker lease), Great Western-Mirabel group, Middletown, East Mayacmas Mining District, Lake County, California, USA |
| 44.5km (27.7 miles) | ⓘPlymouth Mine, Calistoga Hot Springs, Napa County, California, USA |
| 44.6km (27.7 miles) | ⓘBaker Mine, Lower Lake, Sulphur Creek Mining District (Sulfur Creek Mining District; Wilbur Springs Mining District), Lake County, California, USA |
| References |
|---|
|
|
