Bournonite
Unknown Owner
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Twinned crystals of Bournonite with well defined faces and edges and displaying the classic cogwheel shape. The cyclic twinnings are disposed on matrix and compose a mineral specimen with a nice aesthetic. Without damage. A fine Bournonite specimen. Watch video.
Product details
SpeciesBournonite
SizeSmall Cabinet
Dimensions5.5 x 6.5 cm
Added on06/16/2025
LocalityBolivia, Potosí, Machacamarca mining district
Known provenance
| Date | Collector | Acquisition price |
|---|---|---|
| 08/2026 | Unknown Owner | Not disclosed |
| — | MChMinerals | Not disclosed |
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Mineral guide
Learn about Bournonite
steel-gray to black sulfosalt famed for cogwheel twinning and metallic luster; prized by collectors for iconic gears and historic localities.Regional guide
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