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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Biotite from
Santa Cecilia Mine, Hiendelaencina, Guadalajara, Castile-La Mancha, Spain


Locality type:Mine
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Santa Cecilia Mine, Hiendelaencina, Guadalajara, Castile-La Mancha, Spain
Data Identifiers
Mindat Occurrence Record ID:369362
Long-form Identifier:1:3:369362:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
15.9km (9.9 miles) ⓘAlpedroches andesite quarry, Alpedroches, Atienza, Guadalajara, Castile-La Mancha, Spain
45.7km (28.4 miles) ⓘLa Garita Stream, Horcajuelo de la Sierra, Community of Madrid, Spain
73.5km (45.7 miles) ⓘUnnamed pegmatite, Rancajales, San Pedro Massif, Soto del Real, Community of Madrid, Spain
78.9km (49.0 miles) ⓘArroyo de la Yedra, Manzanares el Real, Community of Madrid, Spain
References
Fabre, Jordi (n.d.) Personal communication.
 
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