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
Markham Mica Quarry, Hog Hill, East Hampton, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:Schorl
Formula:NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Comments:Most likely schorl though the species is not specified in the reference. An accessory in the core zone.
Colour:black
Quality for species:Poor for species, only of interest for locality collectors. (#)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Schorl data
Locality Data:Click here to view Markham Mica Quarry, Hog Hill, East Hampton, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:654652
Long-form Identifier:1:3:654652:6
GUID (UUID V4):0
Nearest other occurrences of Schorl
0.4km (0.2 miles) ⓘReeb Mica Quarry, Hog Hill, East Hampton, Middlesex County, Connecticut, USA
0.5km (0.3 miles) ⓘDimension stone quarries, Hog Hill, East Hampton, Middlesex County, Connecticut, USA
1.7km (1.0 miles) ⓘHalberg Quarries (Eureka Quarry; Cook Quarry; Gem Stone Quarry), East Hampton, Middlesex County, Connecticut, USA
2.5km (1.6 miles) ⓘHurd State Park quarries, East Hampton, Middlesex County, Connecticut, USA
3.0km (1.9 miles) ⓘEnegren Mica Mine, East Hampton, Middlesex County, Connecticut, USA
3.4km (2.1 miles) ⓘAnderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
3.4km (2.1 miles) ⓘAnderson No. 2 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
3.5km (2.2 miles) ⓘGreat Hill Pond Brook pegmatite, Cobalt, East Hampton, Middlesex County, Connecticut, USA
3.7km (2.3 miles) ⓘState Forest Quarry No. 2, Cobalt, East Hampton, Middlesex County, Connecticut, USA
4.2km (2.6 miles) ⓘRock Landing Quarry (Capt. Rohrback Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
References
Cameron et al (1954) USGS Prof Paper 255
 
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