Bournonite
Unknown Owner
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Metalic silver crystals of Bournonite forming cyclic twins with very well formed faces and edges and displaying the classic cogwheel shape.It is disposed on a matrix with small lustrous crystals of Pyrite and Quartz. The piece is in excellent condition. Watch video.
Product details
SpeciesBournonite
SizeCabinet
Dimensions7.0 x 12.0 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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