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Bournonite (large "cogwheel") on matrix 
Back to CONSIGNMENT and COLLECTION AUCTIONS - Ends June 17th
Machacamarca Mine, near Colavi, Potosi Department, Bolivia
- Starting Time:6/10/2010 06:45:00 PM(CDT)
- Ending Time:6/17/2010 06:45:00 PM(CDT)
Time Left:Auction Is Closed
- Size:CABINET
- Size Description:11.0 x 6.3 x 4.8 cm
Description:This is one of the largest "cogwheel" specimens of Bournonite that I have offered from Bolivia in the auctions. This piece hosts an attractive, sharp, tabular, very lustrous, metallic, silvery color, "cogwheel"-shaped crystal group measuring 5.1 cm (over 2 inches!) across sitting atop a matrix with Pyrite and minor associated micro Quartz. This specimen is from a find last year in Bolivia, and is certainly a big "cogwheel" not just for this locality, but any world locality. The piece is visibly repaired, otherwise it would be valued around $2500-$3000 retail, but it still stands as one of the largest and most lustrous "cogwheels" I have seen from the locality.
