Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Precious Opal from
Little Joe opal mine (Black Rock mine; Little Jo mine), Donnelly Mining District, Humboldt County, Nevada, USA


Locality type:Mine
Classification
Species:Opal var: Precious Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Precious Opal data
Locality Data:Click here to view Little Joe opal mine (Black Rock mine; Little Jo mine), Donnelly Mining District, Humboldt County, Nevada, USA
Data Identifiers
Mindat Occurrence Record ID:283220
Long-form Identifier:1:3:283220:3
GUID (UUID V4):0
Nearest other occurrences of Precious Opal
11.3km (7.0 miles) ⓘRoyal Rainbow Mine, Donnelly Mining District, Humboldt County, Nevada, USA
72.7km (45.2 miles) ⓘRoyal Peacock Group Mines, Virgin Valley, Humboldt County, Nevada, USA
74.1km (46.0 miles) ⓘRainbow Ridge Mine (Monarch Opal Mine; Roop Mine), Virgin Valley, Humboldt County, Nevada, USA
74.3km (46.2 miles) ⓘRincon Belle Extension, Rainbow Ridge Mine (Monarch Opal Mine; Roop Mine), Virgin Valley, Humboldt County, Nevada, USA
74.6km (46.3 miles) ⓘJo Lu 55 Opal Mine, Virgin Valley, Humboldt County, Nevada, USA
75.4km (46.8 miles) ⓘSwordfish Mine, Virgin Valley, Humboldt County, Nevada, USA
75.5km (46.9 miles) ⓘToni Fire Opal Mine (Kaleidoscope Fire Opal), Virgin Valley, Humboldt County, Nevada, USA
75.6km (46.9 miles) ⓘBecky-Mucket claims, Virgin Valley, Humboldt County, Nevada, USA
75.6km (47.0 miles) ⓘBlack Hope group, Virgin Valley, Humboldt County, Nevada, USA
76.2km (47.4 miles) ⓘGreen Fire Mine, Virgin Valley, Humboldt County, Nevada, USA
References
Castor, Stephen B.; Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology 512pp.
 
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