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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Orthoclase from
New London Mine (Linganore Mine), New London, Frederick County, Maryland, USA


Locality type:Mine
Classification
Species:Orthoclase
Formula:K(AlSi3O8)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Orthoclase data
Locality Data:Click here to view New London Mine (Linganore Mine), New London, Frederick County, Maryland, USA
Data Identifiers
Mindat Occurrence Record ID:201970
Long-form Identifier:1:3:201970:3
GUID (UUID V4):0
Nearest other occurrences of Orthoclase
37.2km (23.1 miles) ⓘFrost Quarry, Davis, Howard County, Maryland, USA
42.2km (26.2 miles) ⓘTeeter Quarry, Cumberland Township, Adams County, Pennsylvania, USA
43.7km (27.2 miles) ⓘWeber's Quarry, Ellicott City, Howard County, Maryland, USA
44.5km (27.6 miles) ⓘGaither's Quarry, Baltimore County, Maryland, USA
46.1km (28.7 miles) ⓘKensington Mica Mine (Gilmore Mine; B. H. Warner Mine), Wheaton, Montgomery County, Maryland, USA
48.1km (29.9 miles) ⓘPaint Branch, White Oak, Montgomery County, Maryland, USA
76.0km (47.2 miles) ⓘVulcan Materials Company Crushed Stone Quarry (Manassas Quarry), Manassas, Prince William County, Virginia, USA
78.7km (48.9 miles) ⓘGrove Mine, Dillsburg Iron Mines, Dillsburg, York County, Pennsylvania, USA
79.1km (49.1 miles) ⓘPrice Mine, Dillsburg Iron Mines, Dillsburg, York County, Pennsylvania, USA
79.4km (49.3 miles) ⓘSmyser Mine, Dillsburg Iron Mines, Dillsburg, York County, Pennsylvania, USA
References
Pearre and Heyl (1965)
 
and/or  
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