Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Bertrandite from
Standpipe Hill Quarries, Topsham, Sagadahoc County, Maine, USA


Locality type:Quarry
Classification
Species:Bertrandite
Formula:Be4(Si2O7)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Bertrandite data
Locality Data:Click here to view Standpipe Hill Quarries, Topsham, Sagadahoc County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:29703
Long-form Identifier:1:3:29703:1
GUID (UUID V4):0
Nearest other occurrences of Bertrandite
4.7km (3.0 miles) ⓘFisher Quarry, Topsham, Sagadahoc County, Maine, USA
23.5km (14.6 miles) ⓘConsolidated Feldspar Quarries, Georgetown, Sagadahoc County, Maine, USA
30.6km (19.0 miles) ⓘBerry-Havey Quarry, Poland, Androscoggin County, Maine, USA
31.2km (19.4 miles) ⓘGreenlaw Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
31.2km (19.4 miles) ⓘMaine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
31.9km (19.8 miles) ⓘKeith Quarry (Towne Quarry), West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
32.0km (19.9 miles) ⓘPulsifer Quarry & Dionne extension, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
32.1km (20.0 miles) ⓘWade Quarry (Androscoggin Tourmaline prospect), West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
48.8km (30.3 miles) ⓘMount Marie Quarries, Paris, Oxford County, Maine, USA
54.7km (34.0 miles) ⓘBennett Quarry, Buckfield, Oxford County, Maine, USA
References
Thompson, Woodrow B., Joyner, Ronald L., Woodman, Raymond G., King, Vandall T. (1998) Bulletin (41), A Collector's Guide to Maine Mineral Localities (3rd ed.) Maine Geological Survey
 
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