Bournonite
Viboras Mine, Machacamarca, Machacamarca District (Colavi District), Cornelio Saavedra Province, Potosí Department, Bolivia
33 x 25 x 21mm

A hard to find "cogwheel"-esque group of sharp, thick, blocky modified twinned crystals of Bournonite with excellent luster and aesthetics. The piece would be classified as a toenail, and displays well from several angles (my favorite being the first picture on the top). The stacked appearance of the crystals, combined with the bright metallic luster makes this one of the more unique smaller Bournonites I have handled from this mine.
Reference:BOURNBOL100910
minID: GM2-QVQ

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