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-ferri-hornblende from
Traversella Mine, Traversella, Metropolitan City of Turin, Piedmont, Italy


Locality type:Mine
Classification
Species:Ferro-ferri-hornblende
Formula:◻Ca2(Fe42+Fe3+)(AlSi7O22)(OH)2
Habit:agicular to lammellar crystals
Colour:dark greenish
Confirmation
Validity:Valid - Type Locality
Data
Mineral Data:Click here to view Ferro-ferri-hornblende data
Locality Data:Click here to view Traversella Mine, Traversella, Metropolitan City of Turin, Piedmont, Italy
Data Identifiers
Mindat Occurrence Record ID:949177
Long-form Identifier:1:3:949177:9
GUID (UUID V4):0
References
Hålenius, U.; Hatert, F.; Pasero, M.; Mills, S. J. (2015) New minerals and nomenclature modifications approved in 2015. Mineralogical Magazine, 79 (5). p.1223-1230. doi:10.1180/minmag.2015.079.5.16
Oberti, Roberta, Boiocchi, Massimo, Hawthorne, Frank C., Ball, Neil A., Cámara, Fernando, Pagano, Renato, Pagano, Adriana (2016) Ferro-ferri-hornblende from the Traversella mine (Ivrea, Italy): occurrence, mineral description and crystal-chemistry. Mineralogical Magazine, 80 (7) 1233-1242 doi:10.1180/minmag.2016.080.060
 
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