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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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Schorl from
Dunn Quarry, Norway, Oxford County, Maine, USA


04396140017365827683894.jpg
Schorl

Dunn Quarry, Norway, Oxford County, Maine, USA
04396140017365827683894.jpg
Schorl

Dunn Quarry, Norway, Oxford County, Maine, USA
04396140017365827683894.jpg
Schorl

Dunn Quarry, Norway, Oxford County, Maine, USA
Locality type:Quarry
Classification
Species:Schorl
Formula:NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Fluorapatite1
Muscovite1
Data
Mineral Data:Click here to view Schorl data
Locality Data:Click here to view Dunn Quarry, Norway, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:31677
Long-form Identifier:1:3:31677:0
GUID (UUID V4):0
Nearest other occurrences of Schorl
2.8km (1.7 miles) ⓘTamminen Quarry, Greenwood, Oxford County, Maine, USA
2.8km (1.7 miles) ⓘPatch Mountain Beryl prospect, Greenwood, Oxford County, Maine, USA
2.8km (1.8 miles) ⓘWaisanen Quarry (Tamminen-Waisanen Quarry), Greenwood, Oxford County, Maine, USA
3.0km (1.9 miles) ⓘB.B. No. 7 Quarry, Norway, Oxford County, Maine, USA
3.3km (2.0 miles) ⓘNubble Quarry, Greenwood, Oxford County, Maine, USA
3.3km (2.1 miles) ⓘNoyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA
3.4km (2.1 miles) ⓘMorgan Quarry (Morgan Pit; Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford County, Maine, USA
3.7km (2.3 miles) ⓘMustonen Ledge prospect, Greenwood, Oxford County, Maine, USA
3.7km (2.3 miles) ⓘWitt Hill Chrysoberyl locality, Greenwood, Oxford County, Maine, USA
3.8km (2.3 miles) ⓘOutback prospect (Gross prospect), Greenwood, 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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