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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Quartz from
Ward Creek [1], Cazadero, Coast Range, Sonoma County, California, USA


Locality type:Creek
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Ward Creek [1], Cazadero, Coast Range, Sonoma County, California, USA
Data Identifiers
Mindat Occurrence Record ID:217481
Long-form Identifier:1:3:217481:5
GUID (UUID V4):0
Nearest other occurrences of Quartz
1.6km (1.0 miles) ⓘWard Creek [2], Cazadero, Coast Range, Sonoma County, California, USA
9.9km (6.2 miles) ⓘGreat Eastern and Mount Jackson Mine, Guerneville, Guerneville Mining District, Coast Range, Sonoma County, California, USA
10.2km (6.4 miles) ⓘRussian River, Russian River Mining District, Coast Range, Sonoma County, California, USA
29.6km (18.4 miles) ⓘAlexander Valley, Mark West Springs, West Mayacmas Mining District, Sonoma County, California, USA
32.8km (20.4 miles) ⓘLivermore Quicksilver Mine, Cloverdale, West Mayacmas Mining District, Sonoma County, California, USA
36.0km (22.4 miles) ⓘCulver-Baer Mine, North Fork Little Sulphur Creek, Cloverdale, West Mayacmas Mining District, Sonoma County, California, USA
37.0km (23.0 miles) ⓘEsperanza Mine (Bright Hope Mine), Sulphur Creek, Black Oaks, West Mayacmas Mining District, Sonoma County, California, USA
37.5km (23.3 miles) ⓘUnnamed quartz prospect [1], Cotati, Sonoma County, California, USA
37.8km (23.5 miles) ⓘContact Mine (Walker; Queen group), Castle Rock Springs area, West Mayacmas Mining District, Sonoma County, California, USA
38.4km (23.8 miles) ⓘEureka Mine (Flagstaff Mine), Castle Rock Springs area, West Mayacmas Mining District, Sonoma County, California, USA
References
www.minsocam.org/msa/Handbook/Winchite.PDF.
Muir Wood, Robert (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine, 43 (327) 363-370 doi:10.1180/minmag.1979.043.327.08
 
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