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
Henderson Station, 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 Henderson Station, Upper Merion Township, Montgomery County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:360506
Long-form Identifier:1:3:360506:6
GUID (UUID V4):0
Nearest other occurrences of Calcite
1.0km (0.6 miles) ⓘLimestone quarry, Upper Merion Township, Montgomery County, Pennsylvania, USA
2.4km (1.5 miles) ⓘKing of Prussia, Upper Merion Township, Montgomery County, Pennsylvania, USA
3.2km (2.0 miles) ⓘBullock Quarry (Geo. Bullock Quarry; George Bullock Quarry), West Conshohocken, Montgomery County, Pennsylvania, USA
8.5km (5.3 miles) ⓘEcton Mine, Perkiomen Mines, Audubon, Lower Providence Township, Montgomery County, Pennsylvania, USA
9.2km (5.7 miles) ⓘHighway Materials Quarry (Old Corson Quarry), Whitemarsh Township, Montgomery County, Pennsylvania, USA
11.3km (7.0 miles) ⓘFlat Rock Tunnel, Lower Merion Township, Montgomery County, Pennsylvania, USA
12.5km (7.7 miles) ⓘWissahickon Valley, Philadelphia, Philadelphia County, Pennsylvania, USA
12.5km (7.7 miles) ⓘHitner's Marble Quarry (Hitner's Quarry), Whitemarsh Township, Montgomery County, Pennsylvania, USA
13.7km (8.5 miles) ⓘWheatley Mines, Schuylkill Township, Chester County, Pennsylvania, USA
14.0km (8.7 miles) ⓘBrookdale Mine, Schuylkill Township, Chester County, Pennsylvania, USA
References
Samuel S. Gordon, pg. 217
Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia 255pp.
 
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