| Locality type: | Mine |
| Classification |
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| Species: | Quartz |
| Formula: | SiO2 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Quartz data |
| Locality Data: | Click here to view Thomas Mine (Thomas deposit; Thomas Round Mountain; North Thomas Mine; Round Mountain), Redwood Valley, Mendocino County, California, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 1004525 |
| Long-form Identifier: | 1:3:1004525:1 |
| GUID (UUID V4): | 7af58418-e829-47e7-b2df-8090206767bc |
| Nearest other occurrences of Quartz |
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| 3.6km (2.2 miles) | ⓘWild Devil Mine (Waldteufel; Waldteufel Mine), Potter Valley area, Coastal Range, Mendocino County, California, USA |
| 21.5km (13.4 miles) | ⓘHearst, Coastal Range, Mendocino County, California, USA |
| 32.1km (20.0 miles) | ⓘDeep Hole Mine (Eden Valley Mine), Eden Valley, Hearst, Coastal Range, Mendocino County, California, USA |
| 42.7km (26.5 miles) | ⓘUnnamed Howieite-Deerite-Zussmanite occurrence [1], Longvale, Coastal Range, Mendocino County, California, USA |
| 43.1km (26.8 miles) | ⓘPieta Creek area, Pieta, Mendocino County, California, USA |
| 43.2km (26.9 miles) | ⓘLaytonville Quarry, Laytonville, Coastal Range, Mendocino County, California, USA |
| 46.2km (28.7 miles) | ⓘSalt Spring Creek, Cloverdale area, Mendocino County, California, USA |
| 47.5km (29.5 miles) | ⓘRosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA |
| 54.7km (34.0 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 |
| 55.1km (34.2 miles) | ⓘCovelo, Round Valley, Coastal Range, Mendocino County, California, USA |
| References |
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Bradley, W.W., Huguenin, Emile, Logan, C.A., Tucker, W.B., and Waring, C.A. (1918), Manganese and chromium in California: California Mining Bureau. Bulletin 76: 46 |
