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Alunite from
The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA

Description
Comments:In 3-9 cm thick veins near Lemonade Springs where it appeared hard and porcelaneous with a smooth fracture, and nearby in veins with greater witdth- where it appeared soft and resembled white clay. (Dunning & Cooper 1993)
Quality of samples:not specified / average specimens
Rarity at site:Common
Confirmation
Validity:Believed Valid
References
References:Vonsen, Magnus (1941) Preliminary report on minerals of The Geysers of Sonoma County, California. Mineralogist: 9: 247; Vonsen, Magnus (1946), Minerals at “The Geysers,” Sonoma County, California: California Division Mines Report 42: 290; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 265; Dunning, G.S. & Cooper, J.F. (1993): History and minerals of The Geysers Sonoma County, California. Mineralogical Record (1993): 24(5): 339-352.
Data
Mineral Data:Click here to view Alunite data
Locality Data:Click here to view The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
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