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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Harmotome from
Manhattan Island, Manhattan (New York County), New York City, New York, USA


05214560017374459937411.jpg
Harmotome, etc.

Manhattan Island, Manhattan, New York City, New York, USA
05214560017374459937411.jpg
Harmotome, etc.

Manhattan Island, Manhattan, New York City, New York, USA
04209420017272017912989.jpg
Harmotome, etc.

Manhattan Island, Manhattan, New York City, New York, USA
Locality type:Island
Classification
Species:Harmotome
Formula:Ba2(Si12Al4)O32 · 12H2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Stilbite Subgroup2
Data
Mineral Data:Click here to view Harmotome data
Locality Data:Click here to view Manhattan Island, Manhattan (New York County), New York City, New York, USA
Data Identifiers
Mindat Occurrence Record ID:80293
Long-form Identifier:1:3:80293:0
GUID (UUID V4):0
References
Manchester, James G. (1931) The Minerals of New York City and its Environs. Bulletin of the New York Mineralogical Club Vol. 3 (1). New York Mineralogical Clubp.25
 
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