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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Galaxite from
Jail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex County, Connecticut, USA


Classification
Species:Galaxite
Formula:Mn2+Al2O4
Comments:A dusting of a dark green mineral is seen in alleghanyite-kutnohorite specimens from the Jail Hill quarry. X-ray diffraction of a mixed sample shows faint peaks that correspond rather well to galaxite.
Colour:dark green
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Galaxite data
Locality Data:Click here to view Jail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:828331
Long-form Identifier:1:3:828331:3
GUID (UUID V4):0
References
Schooner, Richard. (circa 1980s), Untitled manuscript on central Connecticut minerals.
 
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