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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Schorl from
Osborne Hill, Birmingham Township, Chester County, Pennsylvania, USA


Locality type:Hill
Classification
Species:Schorl
Formula:NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Schorl data
Locality Data:Click here to view Osborne Hill, Birmingham Township, Chester County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:360241
Long-form Identifier:1:3:360241:6
GUID (UUID V4):0
Nearest other occurrences of Schorl
1.5km (0.9 miles) ⓘBrinton's Quarry, Westtown Township, Chester County, Pennsylvania, USA
13.6km (8.4 miles) ⓘHenry Pusey's quarry, Willowdale, East Marlboro Township, Chester County, Pennsylvania, USA
15.6km (9.7 miles) ⓘDickson's Quarry (Dixon's Quarry), Wilmington, New Castle County, Delaware, USA
16.9km (10.5 miles) ⓘBoothwyn, Upper Chichester Township, Delaware County, Pennsylvania, USA
19.7km (12.3 miles) ⓘCoatesville pegmatite locality, Coatesville, Chester County, Pennsylvania, USA
20.5km (12.8 miles) ⓘDeshong's Quarry, Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
20.9km (13.0 miles) ⓘKeystone Trap Rock Quarry, Cornog, Wallace Township, Chester County, Pennsylvania, USA
21.2km (13.1 miles) ⓘSmedley Park beryl locality, Springfield Township, Delaware County, Pennsylvania, USA
29.1km (18.1 miles) ⓘWest Branch pegmatite, Newark, New Castle County, Delaware, USA
29.8km (18.5 miles) ⓘElk Creek pegmatite, Elk Township, Chester County, Pennsylvania, USA
References
Samuel S. Gordon, pg. 167
Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia 255pp.
 
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