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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Achroite from
Columbia Mine (April Fool claim; Belo Horizonte claim; California Gem Mine; Columbia Gem Mine; Desert Rose claim; San Jacinto Gem Mine; Discovery), Thomas Mountain, Thomas Mountain [town], Cahuilla Mining District, Riverside County, California, USA


Locality type:Mine
Classification
Species:Tourmaline var: Achroite
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Achroite data
Locality Data:Click here to view Columbia Mine (April Fool claim; Belo Horizonte claim; California Gem Mine; Columbia Gem Mine; Desert Rose claim; San Jacinto Gem Mine; Discovery), Thomas Mountain, Thomas Mountain [town], Cahuilla Mining District, Riverside County, California, USA
Data Identifiers
Mindat Occurrence Record ID:480575
Long-form Identifier:1:3:480575:5
GUID (UUID V4):0
Nearest other occurrences of Achroite
30.6km (19.0 miles) ⓘCryo-Genie Mine, Warner Springs, Warner Springs Mining District, San Diego County, California, USA
31.0km (19.3 miles) ⓘMountain Lily Mine (Emeralite No. 2 claim; Gem Mine No. 1 claim; Ware mine), Aguanga Mountain, Oak Grove, Aguanga Mountain Mining District (Smith Mountain Mining District), San Diego County, California, USA
44.7km (27.8 miles) ⓘSan Diego Mine, Gem Hill, Mesa Grande Mining District, San Diego County, California, USA
46.0km (28.6 miles) ⓘVictor Mine (Big Buck mine; Big Buck prospect), Rincon Mountain, Rincon, Rincon Mining District, San Diego County, California, USA
46.5km (28.9 miles) ⓘClark Extension prospect, Ditch Mountain, Rincon, Rincon Mining District, San Diego County, California, USA
46.5km (28.9 miles) ⓘTourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala Mining District, San Diego County, California, USA
46.7km (29.0 miles) ⓘTourmaline King Mine, Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala Mining District, San Diego County, California, USA
References
Kunz, George F. (1905) Gems, Jewelers' Materials, and Ornamental Stones of California. Bulletin 37 (2nd ed.) California State Mining Bureau
 
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