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
Municipal Quarry, Portland, Cumberland County, Maine, USA


Locality type:Quarry
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 Municipal Quarry, Portland, Cumberland County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:99843
Long-form Identifier:1:3:99843:1
GUID (UUID V4):0
Nearest other occurrences of Schorl
20.8km (13.0 miles) ⓘPorter Landing prospects, Freeport, Cumberland County, Maine, USA
23.5km (14.6 miles) ⓘBradbury Mountain State Park locality, Pownal, Cumberland County, Maine, USA
24.5km (15.3 miles) ⓘTryon Mountain Quarries, Pownal, Cumberland County, Maine, USA
27.3km (17.0 miles) ⓘLaChance Quarry, Brunswick, Cumberland County, Maine, USA
33.5km (20.8 miles) ⓘRussell Brothers Quarry, Topsham, Sagadahoc County, Maine, USA
35.5km (22.0 miles) ⓘPorcupine Hill Quarry, Topsham, Sagadahoc County, Maine, USA
36.2km (22.5 miles) ⓘMount Ararat Quarries, Topsham, Sagadahoc County, Maine, USA
36.3km (22.6 miles) ⓘParker Head Quarry, Parker Head, Phippsburg, Sagadahoc County, Maine, USA
36.4km (22.6 miles) ⓘFuller Mountain Quarry, Phippsburg, Sagadahoc County, Maine, USA
37.3km (23.2 miles) ⓘConsolidated #1 Quarry, Highland Green, Topsham, Sagadahoc County, Maine, USA
References
Rocks & Min.: 5:46.
 
and/or  
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