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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Silica from
Pittsburg Sand Company Mine, Somersville, Contra Costa County, California, USA


Locality type:Mine
Classification
Species:'Silica' (not an IMA approved species)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Silica data
Locality Data:Click here to view Pittsburg Sand Company Mine, Somersville, Contra Costa County, California, USA
Data Identifiers
Mindat Occurrence Record ID:716376
Long-form Identifier:1:3:716376:0
GUID (UUID V4):0
Nearest other occurrences of Silica
0.5km (0.3 miles) ⓘAntioch Mine, Somersville, Contra Costa County, California, USA
1.7km (1.0 miles) ⓘRoberts Sand Company Mine (Black Diamond Mine), Nortonville, Contra Costa County, California, USA
2.2km (1.4 miles) ⓘUnnamed Silica mine [1], Nortonville, Contra Costa County, California, USA
4.4km (2.7 miles) ⓘAntioch-Marchio prospect, Antioch, Contra Costa County, California, USA
15.6km (9.7 miles) ⓘSilica Company of California Mine, Brentwood, Contra Costa County, California, USA
20.5km (12.7 miles) ⓘByron plant, Byron, Contra Costa County, California, USA
40.6km (25.2 miles) ⓘUnknown Silica prospect [1], Tesla, Livermore Mining District (Tesla District), Alameda County, California, USA
75.4km (46.9 miles) ⓘHammond occurrence (Silica No. 1), Copper Mountain, Black Wonder Mining District, Stanislaus County, California, USA
77.1km (47.9 miles) ⓘJ. J. Cummings and Thomas Wolf property, Patterson, Stanislaus County, California, USA
87.4km (54.3 miles) ⓘPacific Clay Products pit, Camanche, Camanche Mining District, Calaveras County, California, USA
References
Davis, Fenelon Francis and H.B. Goldman (1958) Mines and mineral resources of Contra Costa County. California Journal of Mines and Geology: 54(4): 582, Pl. 5.
 
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