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
Pulsifer Quarry & Dionne extension, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA


Locality type:Quarry
Classification
Species:Bertrandite
Formula:Be4(Si2O7)(OH)2
Comments:One of the world's best untwinned bertrandite crystal clusters (to 4.4 x 2.5 x 2.5 cm) found about 1996 by Gregg Dionne.
Quality for species:Excellent - world class for species or very significant. (!!)
Abundance at site:Rare
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Bertrandite data
Locality Data:Click here to view Pulsifer Quarry & Dionne extension, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:33269
Long-form Identifier:1:3:33269:9
GUID (UUID V4):0
Nearest other occurrences of Bertrandite
0.1km (0.1 miles) ⓘKeith Quarry (Towne Quarry), West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
0.1km (0.1 miles) ⓘWade Quarry (Androscoggin Tourmaline prospect), West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
0.9km (0.6 miles) ⓘMaine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
1.0km (0.6 miles) ⓘGreenlaw Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
2.0km (1.2 miles) ⓘBerry-Havey Quarry, Poland, Androscoggin County, Maine, USA
17.6km (10.9 miles) ⓘMount Marie Quarries, Paris, Oxford County, Maine, USA
23.7km (14.7 miles) ⓘSlattery Quarry, Paris, Oxford County, Maine, USA
24.2km (15.0 miles) ⓘMount Mica Quarry, Paris, Oxford County, Maine, USA
24.7km (15.3 miles) ⓘBennett Quarry, Buckfield, Oxford County, Maine, USA
24.9km (15.4 miles) ⓘOrchard Quarry, Buckfield, Oxford County, Maine, USA
References
Rocks and Minerals, (1997) 72:44-48
King, Vandall T. (2000) Mineralogy of Maine Vol. 2 - Mining History, Gems, and Geology. Maine Geological Survey.
 
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