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0 item @ $0.00  

Eucairite with Umangite & Klockmanite

#RW47275

Eucairite with Umangite & Klockmanite

#RW47275
Availability
Sold
Size
4 x 3.5 x 3 cm - Miniature 
Formula
CuAgSe (RRUFF)
Locality
Sierra de Umango, La Rioja, Argentina
Tagged
sulfide , copper , selenium , silver

The specimen is probably mostly Umangite, judging by the purplish tarnish. Although there are components of Eucairite since silver was detected by microprobe analysis performed by Cannon Microprobe. 

Eucairite

Formula
CuAgSe 
Crystal System
Orthorhombic 
Crystal Habit
Aggregates 
Cleavage
None, None, None 
Luster
Metallic 
Color
bronze, bronze, gray, silver white, tin white 
Streak
gray white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Subconchoidal 
Hardness
2.5 

Data courtesy of Webmineral.

Collection
Robert J. Waidler Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Eucairite
On Dakota Matrix
Other Available Eucairite
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