Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Garnet Group from
The Geysers, West Mayacmas Mining District, Sonoma County, California, USA


Locality type:Geothermal Field
Classification
Species:'Garnet Group' (not an IMA approved species)
Formula:X3Z2(SiO4)3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Garnet Group data
Locality Data:Click here to view The Geysers, West Mayacmas Mining District, Sonoma County, California, USA
Data Identifiers
Mindat Occurrence Record ID:614014
Long-form Identifier:1:3:614014:4
GUID (UUID V4):0
Nearest other occurrences of Garnet Group
14.4km (9.0 miles) ⓘSchaffer prospect, Glenview, Lake County, California, USA
23.7km (14.8 miles) ⓘUnnamed stone quarry [9], Mill Creek Road, Healdsburg, Sonoma County, California, USA
38.7km (24.1 miles) ⓘWard Creek [1], Cazadero, Coast Range, Sonoma County, California, USA
39.8km (24.7 miles) ⓘWard Creek [2], Cazadero, Coast Range, Sonoma County, California, USA
44.5km (27.6 miles) ⓘUnnamed Garnet occurrence [2], Occidental, Coast Range, Sonoma County, California, USA
51.7km (32.1 miles) ⓘCapell Creek, Lake Berryessa area, Napa County, California, USA
References
Bird, Dennis K., Schiffman, Peter, Elders, Wilfred A., Williams, Alan E., McDowell, S. Douglas (1984) Calc-silicate mineralization in active geothermal systems. Economic Geology, 79 (4) 671-695 doi:10.2113/gsecongeo.79.4.671
 
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