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Bournonite ("cogwheel") 
Back to CONSIGNMENT and COLLECTION AUCTIONS - Ends January 5th, 2012
Machacamarca Mine, near Colavi, Potosi Department, Bolivia
- Starting Time:12/29/2011 06:45:00 PM(CST)
- Ending Time:1/5/2012 06:45:00 PM(CST)
Time Left:Auction Is Closed
- Size:Thumbnail
- Size Description:2.2 x 1.6 x 1.4 cm
Description:One of the few single "cogwheel" specimens of Bournonite that I have offered from Bolivia in the auctions for a while. This piece is an attractive, sharp, fairly thick, prismatic, lustrous, metallic, silvery-grey color, "cogwheel"-shaped crystal group. This specimen is from a find in 2005 in Bolivia, with the exception of a few rough spots, is in great shape overall from the standpoint of damage. Comparatively, the Bolivian Bournonite "cogwheels" are priced significantly lower than their contemporary Chinese counterparts, and a piece like this from Machacamarca is very difficult to find.
