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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Tennantite Subgroup from
Fonte da Cal Mine, Bendada Mines, Bendada, Sabugal, Guarda, Portugal


Locality type:Mine
Classification
Species:'Tennantite Subgroup' (not an IMA approved species)
Formula:Cu6(Cu4C22+)As4S12S
Confirmation
Validity:Confirmed
Confirmation Methods:Polarised-light microscopy
SEM-EDS
Data
Mineral Data:Click here to view Tennantite Subgroup data
Locality Data:Click here to view Fonte da Cal Mine, Bendada Mines, Bendada, Sabugal, Guarda, Portugal
Data Identifiers
Mindat Occurrence Record ID:974395
Long-form Identifier:1:3:974395:3
GUID (UUID V4):0
Nearest other occurrences of Tennantite Subgroup
52.0km (32.3 miles) ⓘLenteiros Mine, Reboleiro, Trancoso, Guarda, Portugal
References
Alves, Pedro (n.d.) Personal communication.
 
and/or  
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