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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Thomsonite Subgroup from
Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA


Locality type:Quarry
Classification
Species:'Thomsonite Subgroup' (not an IMA approved species)
Comments:Occurs as clusters of prismatic and bladed crystals in cavities in quartz and prehnite on the 910 level.
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Prehnite
Quartz
Data
Mineral Data:Click here to view Thomsonite Subgroup data
Locality Data:Click here to view Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Jurupa Valley, Riverside County, California, USA
Data Identifiers
Mindat Occurrence Record ID:688228
Long-form Identifier:1:3:688228:0
GUID (UUID V4):0
Nearest other occurrences of Thomsonite Subgroup
86.1km (53.5 miles) ⓘBrush Canyon Quarry (Pacific Electric Quarry; Neuerberg locality 2), Brush Canyon, Hollywood, Hollywood Hills, Los Angeles, Los Angeles County, California, USA
References
Jenni, Clarence M. (1957), Crestmore and its minerals: Gems & Minerals, No. 236: 64, 66 (May, 1957)
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 366
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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