Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Bytownite from
Ribeira do Mosteiro Mines (Riba de Alva Mines), Poiares, Freixo de Espada à Cinta, Bragança, Portugal


Locality type:Mine
Classification
Species:Anorthite var: Bytownite
Formula:(Ca,Na)[Al(Al,Si)Si2O8]
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Bytownite data
Locality Data:Click here to view Ribeira do Mosteiro Mines (Riba de Alva Mines), Poiares, Freixo de Espada à Cinta, Bragança, Portugal
Data Identifiers
Mindat Occurrence Record ID:801513
Long-form Identifier:1:3:801513:6
GUID (UUID V4):0
References
Gaspar, L. M.; Inverno, C. M. C. (2000) Mineralogy and Metasomatic Evolution of Distal Strata-Bound Scheelite Skarns in the Riba de Alva Mine, Northeastern Portugal. Economic Geology, 95 (6). p.1259-1275. doi:10.2113/gsecongeo.95.6.1259
 
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