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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Calcite from
Harleysville Materials Quarry (M&M Stone), Lower Salford Township, Montgomery County, Pennsylvania, USA


Locality type:Quarry
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Harleysville Materials Quarry (M&M Stone), Lower Salford Township, Montgomery County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:920376
Long-form Identifier:1:3:920376:1
GUID (UUID V4):0
Nearest other occurrences of Calcite
6.1km (3.8 miles) ⓘOld Perkiomen Mine, Lower Frederick Township, Montgomery County, Pennsylvania, USA
7.4km (4.6 miles) ⓘKibblehouse Quarry, Perkiomenville, Marlborough Township, Montgomery County, Pennsylvania, USA
17.0km (10.6 miles) ⓘEcton Mine, Perkiomen Mines, Audubon, Lower Providence Township, Montgomery County, Pennsylvania, USA
17.2km (10.7 miles) ⓘBlack Rock Tunnel (Conrail Tunnel), Phoenixville, Chester County, Pennsylvania, USA
19.2km (11.9 miles) ⓘEureka Stone Quarry, Eureka, Warrington Township, Bucks County, Pennsylvania, USA
19.7km (12.3 miles) ⓘDoan's Lead Mine (New Britain Mine), New Galena, New Britain Township, Bucks County, Pennsylvania, USA
20.1km (12.5 miles) ⓘKing of Prussia, Upper Merion Township, Montgomery County, Pennsylvania, USA
20.7km (12.9 miles) ⓘLimestone quarry, Upper Merion Township, Montgomery County, Pennsylvania, USA
21.1km (13.1 miles) ⓘMartin Stone Quarry, Berks County, Pennsylvania, USA
21.1km (13.1 miles) ⓘWheatley Mines, Schuylkill Township, Chester County, Pennsylvania, USA
References
Warren Cummings
 
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