Bournonite

Unknown Owner

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There was a find of this relatively rare copper sulfosalt about 6 years ago at Machacamarca, and this piece is definitely one of the more attractive specimens to come out in this size range. This piece features a lovely, sharp, lustrous, tabular, silvery-grey color, somewhat "cogwheel"-shaped crystal groups on Pyrite and Quartz matrix. This is actually an attractive specimen (especially for this mine), and displays very well There was only one pocket from this mine that produced these highly unusual Bournonite crystals. Ex. Brian Kosnar.