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Opal from
Andrada Marble Quarry, Helvetia-Rosemont Mining District, Pima Co., Arizona, USA

Locality type:Quarry
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
References
References:MRDS database Dep. ID file #10060227, MRDS ID #TC10194.
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Andrada Marble Quarry, Helvetia-Rosemont Mining District, Pima Co., Arizona, USA
Nearest other occurrences of Opal
11.3km (7.0 miles) Omega Mine (Omega tunnel; Omega Extension Mine), Monument Mountain, Helvetia, Helvetia-Rosemont Mining District, Pima Co., Arizona, USA
31.9km (19.8 miles) Mission complex, San Xavier, Pima Mining District (Olive Mining District; Mineral Hill Mining District; Twin Buttes Mining District), Sierrita Mountains, Pima Co., Arizona, USA
32.2km (20.0 miles) Copper Glance Mine (Glance Mine), Stevens Mountain, Pima Mining District (Olive Mining District; Mineral Hill Mining District; Twin Buttes Mining District), Sierrita Mountains, Pima Co., Arizona, USA
34.8km (21.6 miles) Post Ranch deposit, Post Ranch, Cochise County, Arizona, USA
47.9km (29.7 miles) Saint David area, Cochise County, Arizona, USA
48.0km (29.8 miles) Lyle Creek Diatomite deposits (Huachuca deposits), Huachuca Mountains Northwestern foothills, Redrock Mining District, Santa Cruz Co., Arizona, USA
48.1km (29.9 miles) Curtis Diatomite deposit (Curtiss Diatomite deposit), Curtis, Cochise County, Arizona, USA
50.2km (31.2 miles) Eagle deposit, Redrock Mining District, Santa Cruz Co., Arizona, USA
53.3km (33.1 miles) American Mine (American shaft; War Eagle Mine; La Vantia Mine; La Ventia Mine), Cochise County, Arizona, USA
63.5km (39.4 miles) Gallagher Vanadium & Rare Minerals Corporation Mine (Gallagher vanadium property; Bradsher Mine; Stella Mine; Vogel Mine; Buena Vista Mine), Cochise County, Arizona, USA
 
Mineral and/or Locality  
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