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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Byssolite from
Volonandrongo (Volonondrongo), Mangataboahangy, Ambatofinandrahana District, Amoron'i Mania, Madagascar


08420020017364883963447.jpg
Byssolite, etc.

Volonandrongo, Mangataboahangy, Ambatofinandrahana District, Amoron'i Mania, Madagascar
08420020017364883963447.jpg
Byssolite, etc.

Volonandrongo, Mangataboahangy, Ambatofinandrahana District, Amoron'i Mania, Madagascar
01843750017272100206851.jpg
Byssolite, etc.

Volonandrongo, Mangataboahangy, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Locality type:Quarry
Classification
Species:Amphibole Supergroup var: Byssolite
Formula:AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Clinozoisite1
Data
Mineral Data:Click here to view Byssolite data
Locality Data:Click here to view Volonandrongo (Volonondrongo), Mangataboahangy, Ambatofinandrahana District, Amoron'i Mania, Madagascar
Data Identifiers
Mindat Occurrence Record ID:352117
Long-form Identifier:1:3:352117:5
GUID (UUID V4):0
References
Lacroix, Alfred (1940) Les modifications mineralogiques secondaires du gisement de phlogopite de Volonandrongo ouest du massif central de Madagascar [Secondary mineralogical modifications of the phlogopite deposit of Volonandrongo west of the central massif of Madagascar]. Compte Rendus Hebdomadaires des Seances de l'Academie des Sciences, 210 (1) 425-429
Behier, Jean (1963) Carte minéralogique de Madagascar. Archive Service Géologique de Madagascar A.1871
 
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