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
Marshfield Granite Quarry (Machias Granite Company), Marshfield, Washington County, Maine, USA


Locality type:Quarry
Classification
Species:Orthoclase
Formula:K(AlSi3O8)
Comments:Old nomenclature
Confirmation
Validity:Erroneously Reported
Data
Mineral Data:Click here to view Orthoclase data
Locality Data:Click here to view Marshfield Granite Quarry (Machias Granite Company), Marshfield, Washington County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:236602
Long-form Identifier:1:3:236602:9
GUID (UUID V4):0
References
Morrill & Hinckley, 1959. Maine Mines & Minerals, Vol. 2
USGS Bull 313
 
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