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Geffroyite

#BAC61507
Geffroyite from San Miguel mine, Moctezuma, Sonora, Mexico - BAC61507
Geffroyite from San Miguel mine, Moctezuma, Sonora, Mexico - BAC61507

Geffroyite

#BAC61507
Availability
Available
Price
$75.00
Size
2.3 x 2 x 1.4 cm - Thumbnail 
Formula
(Cu,Fe,Ag)9Se8 (RRUFF)
Locality
San Miguel mine, Moctezuma, Sonora, Mexico
Tagged
copper , selenium , silver

Silvery crystal grains to 0.5mm and in aggregates to around 2mm. The Geffroyite is scattered throughout the matrix not just the arrowed areas.

Geffroyite

Formula
(Cu,Fe,Ag)9Se8 
Crystal System
Isometric 
Luster
Metallic 
Color
bronze brown 
Class
Isometric - Hexoctahedral 
Hardness
2.5 

Data courtesy of Webmineral.

Collection
William & Anne Cook Collection
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