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Glaucophane from
Laytonville Quarry (Longvale; Longvale Quarry), Laytonville, Coastal Range, Mendocino Co., California, USA

Locality type:Quarry
Classification
Species:Glaucophane
Formula:◻[Na2][Mg3Al2]Si8O22(OH)2
Comments:Occurs as small interlocking prismatic crystals from 0.2 to 1.5mm.Occurs as glaucophane schist.
Habit:Prismatic
Confirmation
Validity:Believed Valid
References
References:Chesterman, C.W. (1966b), Mineralogy of the Laytonville quarry, Mendocino County, California, in: Geology of Northern California: California Division Mines & Geol. Bulletin 190: 503, 506; Pemberton, H. Earl (1983), Minerals of California: 403.; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 70.; Robert Muir Wood (1982) The Laytonville Quarry (Mendocino County California) Exotic Block: Iron-rich Blueschist-Facies Subduction-Zone Metamorphism. Mineralogical Magazine 45:87-99.
Associated Minerals:
Associates:Lawsonite
Riebeckite
Stilpnomelane
Associated Minerals Based on Photo Data:
Almandine6 photos of Glaucophane associated with Almandine at this locality.
Albite1 photo of Glaucophane associated with Albite at this locality.
Data
Mineral Data:Click here to view Glaucophane data
Locality Data:Click here to view Laytonville Quarry (Longvale; Longvale Quarry), Laytonville, Coastal Range, Mendocino Co., California, USA
Nearest other occurrences of Glaucophane
89.1km (55.4 miles) Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino Co., California, USA
 
Mineral and/or Locality  
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