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Datolite from
Fort Point, San Francisco, San Francisco Co., California, USA

Locality type:Point
Classification
Species:Datolite
Formula:CaB(SiO4)(OH)
Comments:Occurs as glassy crystals and white veins in an altered diabase dike in serpentine.
Colour:White
Confirmation
Validity:Believed Valid
References
References:Eakle, Arthur Starr (1901), Mineralogical notes; with chemical analyses by W.T. Schaller: University of California, Department of Geological Science Bulletin: 2: 317; Kunz, George Frederick (1905a), Gems, jewelers’ materials, and ornamental stones of California: California Division Mines Bulletin 37, 171 pp.: 97; Schaller, Waldemar Theodore (1911a), Mineralogical notes, series 1: USGS Bulletin 490: 103; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 508; Rocks & Minerals (2010): 85: 338-345; www.missourigeologists.org/Min-Loc1-2005.pdf.
Associated Minerals:
Associates:Pectolite
Quartz
Serpentine Subgroup
Data
Mineral Data:Click here to view Datolite data
Locality Data:Click here to view Fort Point, San Francisco, San Francisco Co., California, USA
Nearest other occurrences of Datolite
113.9km (70.7 miles) A The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
129.4km (80.4 miles) B Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino Co., California, USA
174.8km (108.6 miles) C Stony Creek bridge roadcut, Stonyford, Coast Ranges, Colusa Co., California, USA
221.1km (137.4 miles) D Clear Creek Canyon, Goat Mountain, New Idria District, Diablo Range, San Benito Co., California, USA
222.8km (138.4 miles) E Clear Creek deposits, Idria Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Mineral and/or Locality  
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