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

Description
Comments:	Found only once in an open fissure with opal, cinnabar and a yellow iron sulphate
Habit:	Long fibers & small poorly terminated crystals
Quality of samples:	not specified / average specimens
Confirmation
Validity:	Believed Valid
References
References:	Dunning, G. S. & Cooper, J. F. (1993): History and minerals of The Geysers Sonoma County, California. Mineralogical Record 24 (5): 339-352
Data
Mineral Data:	Click here to view Gypsum data
Locality Data:	Click here to view The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA

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