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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Sillimanite from
Biron Quarry, Sumner, Oxford County, Maine, USA


Locality type:Quarry
Classification
Species:Sillimanite
Formula:Al2(SiO4)O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sillimanite data
Locality Data:Click here to view Biron Quarry, Sumner, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:537997
Long-form Identifier:1:3:537997:2
GUID (UUID V4):0
Nearest other occurrences of Sillimanite
13.8km (8.6 miles) ⓘWitt Hill Chrysoberyl locality, Greenwood, Oxford County, Maine, USA
20.3km (12.6 miles) ⓘState Route 4 road cut, Turner, Androscoggin County, Maine, USA
27.9km (17.4 miles) ⓘVerrill locality, Stoneham, Oxford County, Maine, USA
29.5km (18.3 miles) ⓘPuzzle Mountain, Newry, Oxford County, Maine, USA
42.6km (26.5 miles) ⓘSabbatus Mountain, Wales, Androscoggin County, Maine, USA
66.5km (41.3 miles) ⓘDundee Falls Kyanite locality, Gorham, Cumberland County, Maine, USA
70.1km (43.6 miles) ⓘGambo Falls Staurolite locality, Gorham, Cumberland County, Maine, USA
70.6km (43.9 miles) ⓘOak Hill area, Standish, Cumberland County, Maine, USA
84.4km (52.4 miles) ⓘSymmes Pond Syenite, Straw Hill occurrence, Newfield, York County, Maine, USA
90.2km (56.0 miles) ⓘBay Point andalusite localities, Georgetown, Sagadahoc 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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