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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Clinoptilolite Subgroup from
Patterson Pass, Livermore, Livermore Mining District (Tesla District), Alameda County, California, USA


Locality type:Pass
Classification
Species:'Clinoptilolite Subgroup' (not an IMA approved species)
Formula:(Na/Ca/K)3-6[Al6-7Si29-30O72] · 20H2O
Comments:Occurs as an authigenic constituent of Briones Sandstone.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Clinoptilolite Subgroup data
Locality Data:Click here to view Patterson Pass, Livermore, Livermore Mining District (Tesla District), Alameda County, California, USA
Data Identifiers
Mindat Occurrence Record ID:645009
Long-form Identifier:1:3:645009:0
GUID (UUID V4):0
Nearest other occurrences of Clinoptilolite Subgroup
31.5km (19.6 miles) ⓘMorrison Canyon, Fremont, Alameda County, California, USA
33.0km (20.5 miles) ⓘMount Diablo (Mt Diablo), Clayton, Contra Costa County, California, USA
46.6km (28.9 miles) ⓘUnnamed Zeolite occurrence [2], Alameda Creek, Union City, Alameda County, California, USA
66.9km (41.6 miles) ⓘInterstate highway 80 - highway 4 intersection area, Hercules, Contra Costa County, California, USA
References
Murata, K.J. and Whiteley, K.R. (1973) Zeolites in the Miocene Briones sandstone and related formations of the central Coast Ranges, California. USGS Jour. Res.: 1: 256-257
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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