Bournonite with Pyrite - image 1
Bournonite with Pyrite - image 2
Bournonite with Pyrite - image 3
Bournonite with Pyrite - image 4
Bournonite with Pyrite - image 5
specimen video

Bournonite with Pyrite

Unknown Owner
Metalic silver crystal of Bournonite forming a complet cyclic twin 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. No damage.

Product details

Species
Bournonite, PyriteAbout Bournonite →
SizeSmall Cabinet
Dimensions6.5 x 7.0 cm
Added on06/16/2025
Locality
Bolivia, Potosí, Machacamarca mining district

Known provenance

DateCollectorAcquisition price
06/2025Unknown OwnerNot disclosed
—MChMineralsNot disclosed

Learn more

Bournonite
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
Bournonite from Machacamarca mining district
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