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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Ferro-hornblende from
Lugar Sill, East Ayrshire, Scotland, UK


Locality type:Sill
Classification
Species:Ferro-hornblende
Formula:◻Ca2(Fe42+Al)(Si7Al)O22(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Ferro-hornblende data
Locality Data:Click here to view Lugar Sill, East Ayrshire, Scotland, UK
Data Identifiers
Mindat Occurrence Record ID:5161
Long-form Identifier:1:3:5161:3
GUID (UUID V4):0
References
[Specimen in the Natural History Museum, London]
 
and/or  
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