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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Calyptolite from
Middletown, Middlesex County, Connecticut, USA


Locality type:City
Classification
Species:Zircon var: Calyptolite
Formula:Zr(SiO4)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calyptolite data
Locality Data:Click here to view Middletown, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:657268
Long-form Identifier:1:3:657268:6
GUID (UUID V4):0
References
Am Jour Sci (1851) 2nd sers vol 12:210
 
and/or  
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