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Andesine from
Darien, Fairfield County, Connecticut, USA

Classification
Species:Albite var: Andesine
Formula:(Na,Ca)[Al(Si,Al)Si2O8]
Comments:"reported as crystals, three inches in length, occurring in biotite schist or diorite gneiss in Darien" (Januzzi, 1976). These are likely from the Harrison Gneiss, a metadiorite, which features large crystals of microcline of this size, so this may be a misidentification. No details on ID method provided.
Confirmation
Validity:Unconfirmed/Questioned
References
References:Januzzi, Ronald E. (1976), Mineral Localities of CT and Southeastern NY State, Taylor Associates/Mineralogical Press, Danbury: 273.
Data
Mineral Data:Click here to view Andesine data
Locality Data:Click here to view Darien, Fairfield County, Connecticut, USA
Nearest other occurrences of Andesine
14.8km (9.2 miles) Greenwich, Fairfield County, Connecticut, USA
16.5km (10.3 miles) Voorhis Quarry, Greenwich, Fairfield County, Connecticut, USA
16.8km (10.4 miles) Ritch Quarry, Greenwich, Fairfield County, Connecticut, USA
41.8km (26.0 miles) U. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
 
Mineral and/or Locality  
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