| Locality type: | Prospect |
| 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 Sampson Lode prospect, Groveland, Big Oak Flat Mining District, East Belt, Tuolumne County, California, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 1010121 |
| Long-form Identifier: | 1:3:1010121:0 |
| GUID (UUID V4): | 71d294cc-d580-42b9-8342-b31d8e38d1cb |
| Nearest other occurrences of Opal |
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| 22.7km (14.1 miles) | ⓘWhite Rock Mine, Chinese Station, Tuolumne County, California, USA |
| 31.4km (19.5 miles) | ⓘDean Mine, Mountain Top, French Creek Mining District, Calaveras County, California, USA |
| 31.9km (19.8 miles) | ⓘStanislaus Mine, Carson Hill Gold Mining Company Mines (Carson Hill Mines), Melones, Carson Hill Mining District (Melones Mining District), Calaveras County, California, USA |
| 32.4km (20.1 miles) | ⓘUnnamed Diatomite occurrence (1), Cooperstown, Stanislaus County, California, USA |
| 59.7km (37.1 miles) | ⓘChili Gulch occurrences, Chili Gulch (Chile Gulch ?), Mokelumne Hill, Mokelumne Hill Mining District, East Belt, Calaveras County, California, USA |
| 62.6km (38.9 miles) | ⓘHooten Ranch deposit, Toyon, Pardee Mining District, Calaveras County, California, USA |
| 64.3km (40.0 miles) | ⓘRough Diamond Mine (Rough Diamond Placer Mine; Rough Diamond Crystal Mine), Chili Gulch (Chile Gulch ?), Mokelumne Hill, Mokelumne Hill Mining District, East Belt, Calaveras County, California, USA |
| 64.3km (40.0 miles) | ⓘGreen Mountain Mine (Calaveras Crystal mine), Chili Gulch (Chile Gulch ?), Mokelumne Hill, Mokelumne Hill Mining District, East Belt, Calaveras County, California, USA |
| 65.6km (40.8 miles) | ⓘGillam Mine, Camp Pardee, Pardee Mining District, Calaveras County, California, USA |
| 66.1km (41.1 miles) | ⓘHexter Placer Mine, Mokelumne Hill, Mokelumne Hill Mining District, East Belt, Calaveras County, California, USA |
| References |
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