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
Brandywine Quarry (Hubbard Quarry), Wilmington, New Castle County, Delaware, USA


Locality type:Quarry
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 Brandywine Quarry (Hubbard Quarry), Wilmington, New Castle County, Delaware, USA
Data Identifiers
Mindat Occurrence Record ID:150213
Long-form Identifier:1:3:150213:8
GUID (UUID V4):0
Nearest other occurrences of Orthoclase
10.1km (6.3 miles) ⓘSwain's Quarry, Pennsbury Township, Chester County, Pennsylvania, USA
10.8km (6.7 miles) ⓘBullock's Quarry, Brandywine Summit, Chadds Ford Township, Delaware County, Pennsylvania, USA
17.1km (10.6 miles) ⓘLenni, Middletown Township, Delaware County, Pennsylvania, USA
17.4km (10.8 miles) ⓘNevin's Quarry, Landenberg, London Britain Township, Chester County, Pennsylvania, USA
17.8km (11.1 miles) ⓘGlen Riddle, Middletown Township, Delaware County, Pennsylvania, USA
18.1km (11.3 miles) ⓘOsborne Hill, Birmingham Township, Chester County, Pennsylvania, USA
21.1km (13.1 miles) ⓘFeldspar Quarry, Mineral Hill, Elwyn, Middletown Township, Delaware County, Pennsylvania, USA
24.0km (14.9 miles) ⓘBlue Hill, Media, Upper Providence Township, Delaware County, Pennsylvania, USA
25.0km (15.5 miles) ⓘMedia, Upper Providence Township, Delaware County, Pennsylvania, USA
25.4km (15.8 miles) ⓘElk Creek pegmatite, Elk Township, Chester County, Pennsylvania, USA
References
Rocks & Min.: 21:280-281.
 
and/or  
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