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Helvine from
Lord Chamberlain Nursing and Rehabilitation Center (7003 Main Street; 7003 State Route 110), Stratford, Fairfield County, Connecticut, USA

Classification
Species:Helvine
Formula:Be3Mn42+(SiO4)3S
Comments:Two 0.8mm crystals found on a single specimen associated with the other common site minerals. Crystal faces are slightly pitted with sub-vitreous luster, dusted with a small amount of sugary white alteration. Could possibly be genthelvite.
Habit:tetragonal, slightly cavernous showing trigonal indentations
Colour:honey-brown
Abundance at site:Extremely Rare
Confirmation
Validity:Confirmed
Confirmation Methods:Optical Analysis
References
References:Henderson, William A., Jr., Charles Weber and Marcelle Weber. (circa 1970), An Alpine Vein Deposit in Stratford, Conn. unpublished manuscript.; Henderson, William A., Jr., Charles Weber and Marcelle Weber. (circa 1970), Helvite from Stratford, Conn. unpublished manuscript.
Data
Mineral Data:Click here to view Helvine data
Locality Data:Click here to view Lord Chamberlain Nursing and Rehabilitation Center (7003 Main Street; 7003 State Route 110), Stratford, Fairfield County, Connecticut, USA
Nearest other occurrences of Helvine
56.7km (35.2 miles) Anderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine; Old Lithia Mine; Chatham Lithia Mine), East Hampton (Chatham), Middlesex Co., Connecticut, USA
 
矿物 and/or 产地  
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