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
King of Prussia, Upper Merion Township, Montgomery County, Pennsylvania, USA


Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view King of Prussia, Upper Merion Township, Montgomery County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:348644
Long-form Identifier:1:3:348644:3
GUID (UUID V4):0
Nearest other occurrences of Calcite
2.3km (1.5 miles) ⓘLimestone quarry, Upper Merion Township, Montgomery County, Pennsylvania, USA
2.4km (1.5 miles) ⓘHenderson Station, Upper Merion Township, Montgomery County, Pennsylvania, USA
5.6km (3.5 miles) ⓘBullock Quarry (Geo. Bullock Quarry; George Bullock Quarry), West Conshohocken, Montgomery County, Pennsylvania, USA
6.1km (3.8 miles) ⓘEcton Mine, Perkiomen Mines, Audubon, Lower Providence Township, Montgomery County, Pennsylvania, USA
11.1km (6.9 miles) ⓘHighway Materials Quarry (Old Corson Quarry), Whitemarsh Township, Montgomery County, Pennsylvania, USA
11.5km (7.1 miles) ⓘWheatley Mines, Schuylkill Township, Chester County, Pennsylvania, USA
11.8km (7.3 miles) ⓘBrookdale Mine, Schuylkill Township, Chester County, Pennsylvania, USA
12.2km (7.6 miles) ⓘMontgomery Mine, Schuylkill Township, Chester County, Pennsylvania, USA
12.6km (7.8 miles) ⓘBlack Rock Tunnel (Conrail Tunnel), Phoenixville, Chester County, Pennsylvania, USA
13.7km (8.5 miles) ⓘFlat Rock Tunnel, Lower Merion Township, Montgomery County, Pennsylvania, USA
References
Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia 255pp. p.217
 
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