Bournonite Cyclic Twin
Bournonite Cyclic Twin from Machacamarca Mine, Potosi, Bolivia
Collection American Museum of Natural History
Description Incredible Bournonite cyclical twin with intersecting crystals. Seen at the 2018 Tucson Gem and Mineral Show ® in the public display case of the American Museum of Natural History.
Locality Machacamarca Mine, Potosi, Bolivia
Specimen Grade D
Photograph © Hershel Friedman, all rights reserved

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