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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Serpentine Subgroup from
Socrates Mine, Castle Rock Springs area, West Mayacmas Mining District, Sonoma County, California, USA


Locality type:Mine
Classification
Species:'Serpentine Subgroup' (not an IMA approved species)
Formula:D3[Si2O5](OH)4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Serpentine Subgroup data
Locality Data:Click here to view Socrates Mine, Castle Rock Springs area, West Mayacmas Mining District, Sonoma County, California, USA
Data Identifiers
Mindat Occurrence Record ID:484136
Long-form Identifier:1:3:484136:4
GUID (UUID V4):0
Nearest other occurrences of Serpentine Subgroup
11.4km (7.1 miles) ⓘGreat Western Mine (Laguna Western; Black Bart Mine; Tucker lease), Great Western-Mirabel group, Middletown, East Mayacmas Mining District, Lake County, California, USA
15.1km (9.4 miles) ⓘLytton, Sonoma County, California, USA
15.2km (9.5 miles) ⓘMirabel Mine, Middletown, East Mayacmas Mining District, Lake County, California, USA
20.9km (13.0 miles) ⓘYordi Ranch deposit (Ekert Ranch), Cloverdale, West Mayacmas Mining District, Sonoma County, California, USA
22.3km (13.9 miles) ⓘOat Hill Mines, Aetna Springs, East Mayacmas Mining District, Napa County, California, USA
28.0km (17.4 miles) ⓘSulphur Bank Mine (Sulfur Bank Mine; Sulphur Bank deposits), Clear Lake Oaks, Sulphur Creek Mining District (Sulfur Creek Mining District; Wilbur Springs Mining District), Lake County, California, USA
28.3km (17.6 miles) ⓘRosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
29.6km (18.4 miles) ⓘHixon Ranch (Vassar Ranch), Pieta, Mendocino County, California, USA
33.3km (20.7 miles) ⓘSonoma Magnesite Mine (Sonoma Magnesite property; Red Slide Mine), Venado, Coast Range, Sonoma County, California, USA
36.0km (22.4 miles) ⓘLaton Mine (Layton Mine; Parmeter Ranch; Yellow Streak Mine; Burl prospect; Lone Bird prospect; Slats prospect; Serpentine prospect; Rattlesnake claim; Red Slide claim), Cazadero, Coast Range, Sonoma County, California, USA
References
Fen Cooper (2002) Mineral News, 18, #10, 1-8.
 
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