Little Joe opal mine (Black Rock mine; Little Jo mine), Donnelly Mining District, Humboldt County, Nevada, USAi
| Regional Level Types | |
|---|---|
| Little Joe opal mine (Black Rock mine; Little Jo mine) | Mine |
| Donnelly Mining District | Mining District |
| Humboldt County | County |
| Nevada | State |
| USA | Country |
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Latitude & Longitude (WGS84):
41° 8' 14'' North , 119° 8' 59'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Gerlach | 206 (2011) | 56.7km |
Mindat Locality ID:
63583
Long-form identifier:
mindat:1:2:63583:6
GUID (UUID V4):
3283b33c-b52f-4ec6-bd5e-8397733f59a7
Calico Hills. Sec 5 T37N R25E.
Originally located by Ray Duffield. Subsequently acquired by David Pooley in the 1980s and renamed the Blackrock Opal Mine. Patented Mining claim; current ownership (2018) uncertain. Precious opal fills voids in basalt.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Opal Formula: SiO2 · nH2O |
| ⓘ Opal var. Precious Opal Formula: SiO2 · nH2O |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Opal | 4.DA.10 | SiO2 · nH2O |
| ⓘ | var. Precious Opal | 4.DA.10 | SiO2 · nH2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Opal | SiO2 · nH2O |
| H | ⓘ Opal var. Precious Opal | SiO2 · nH2O |
| O | Oxygen | |
| O | ⓘ Opal | SiO2 · nH2O |
| O | ⓘ Opal var. Precious Opal | SiO2 · nH2O |
| Si | Silicon | |
| Si | ⓘ Opal | SiO2 · nH2O |
| Si | ⓘ Opal var. Precious Opal | SiO2 · nH2O |
Other Regions, Features and Areas containing this locality
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