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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Plagioclase from
Magara mine (Lake Manyara alexandrite-emerald deposit), Lake Manyara, Arusha Region, Tanzania


Locality type:Mine
Classification
Species:'Plagioclase' (not an IMA approved species)
Formula:(Na,Ca)[(Si,Al)AlSi2]O8
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Plagioclase data
Locality Data:Click here to view Magara mine (Lake Manyara alexandrite-emerald deposit), Lake Manyara, Arusha Region, Tanzania
Data Identifiers
Mindat Occurrence Record ID:371177
Long-form Identifier:1:3:371177:4
GUID (UUID V4):0
References
(2002) Emeralds of the World. extraLapis English 2. Lapis International LLCpp.24-35
 
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