Ex my private collection #0542 I love the semi-natural/semi-mechanical look of this bournonite grouping. It's complex variety of crystal faces and classic "cogwheel" form give it an inviting and interesting look. There is a range of luster from mirror to matte and it's size makes it manageable in any suite of sulfides or minerals of South America. Looks even better in person! 42 X 27 X 19mm
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