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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
Waisanen Quarry (Tamminen-Waisanen Quarry), Greenwood, Oxford County, Maine, USA


06215140017366046655390.jpg
Bertrandite, etc.

Waisanen Quarry, Greenwood, Oxford County, Maine, USA
07778480017368329185704.jpg
Bertrandite, etc.

Waisanen Quarry, Greenwood, Oxford County, Maine, USA
04607670017368329191842.jpg
Bertrandite, etc.

Waisanen Quarry, Greenwood, Oxford County, Maine, USA
01632890017368329208460.jpg
Bertrandite, etc.

Waisanen Quarry, Greenwood, Oxford County, Maine, USA
06215140017366046655390.jpg
Bertrandite, etc.

Waisanen Quarry, Greenwood, Oxford County, Maine, USA
07120350017364513246911.jpg
Bertrandite, etc.

Waisanen Quarry, Greenwood, Oxford County, Maine, USA
09198000017362787161807.jpg
Bertrandite, etc.

Waisanen Quarry, Greenwood, Oxford County, Maine, USA
01632890017368329208460.jpg
Bertrandite, etc.

Waisanen Quarry, Greenwood, Oxford County, Maine, USA
07236990017368329202073.jpg
Bertrandite, etc.

Waisanen Quarry, Greenwood, Oxford County, Maine, USA
04304460017368329211544.jpg
Bertrandite, etc.

Waisanen Quarry, Greenwood, Oxford County, Maine, USA
09990140017368329217635.jpg
Bertrandite, etc.

Waisanen Quarry, Greenwood, Oxford County, Maine, USA
04961930017368329222426.jpg
Bertrandite, etc.

Waisanen Quarry, Greenwood, Oxford County, Maine, USA
Locality type:Quarry
Classification
Species:Bertrandite
Formula:Be4(Si2O7)(OH)2
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Rare
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz8
Fluorapatite1
Data
Mineral Data:Click here to view Bertrandite data
Locality Data:Click here to view Waisanen Quarry (Tamminen-Waisanen Quarry), Greenwood, Oxford County, Maine, USA
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:28397
Long-form Identifier:1:3:28397:7
GUID (UUID V4):0
Nearest other occurrences of Bertrandite
0.1km (0.1 miles) ⓘTamminen Quarry, Greenwood, Oxford County, Maine, USA
0.8km (0.5 miles) ⓘMorgan Quarry (Morgan Pit; Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford County, Maine, USA
0.8km (0.5 miles) ⓘNoyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA
1.1km (0.7 miles) ⓘOutback prospect (Gross prospect), Greenwood, Oxford County, Maine, USA
1.2km (0.8 miles) ⓘHayes Ledge Quarries (East and West), Greenwood, Oxford County, Maine, USA
1.9km (1.2 miles) ⓘB.B. No. 7 Quarry, Norway, Oxford County, Maine, USA
3.6km (2.3 miles) ⓘOhtonen Quarry, Greenwood, Oxford County, Maine, USA
6.3km (3.9 miles) ⓘEmmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
6.4km (4.0 miles) ⓘSki Pike Quarry, West Paris, Oxford County, Maine, USA
7.2km (4.5 miles) ⓘTiger Bill Quarries, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
References
King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey.
 
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