• Bournonite
  • Bournonite
  • Bournonite


$950.00   €801  £690.00 approx.  

This specimen is priced in US dollars, all other prices are approximate.

ID: CC19983
This beautifully crystallised small miniature Bournonite is from the Viboras mine in Machacamarca, Bolivia, a small silver mine which is still in operation.  Bournonite, commonly called cog wheel ore, is a lead-copper sulphosalt and in this specimen forms characteristic cog wheel crystals to at least 1.8 cm diameter, with well defined, sharp, steel blue to silver black crystals.  The Bournonite is associated with granular crystalline clustered druses infilling voids between the crystals, whose species is uncertain and requires microscopic study.  An aesthetic Bournonite from this recent find at the Viboras mine in Bolivia.


4.3 × 5.0 × 3.2 cm
Sulphides, Sulphosalts and Arsenides
Viboras Mine, Machacamarca, Machacamarca District, Cornelio Saavedra Province, Potosí Department, Bolivia

Minerals on Specimen

Minerals on specimen

Related Mineral Specimens

Bournonite with Quartz
 Herodsfoot Mine, Lanreath, Cornwall, England, Europe
A first-class specimen of classic ‘cog-wheel’ ore, the lead-copper antimoniate, Bournonite, from...
Bournonite on Siderite
 Pribram, Bohemia, Czech Republic, Europe
A single well formed bright metallic silver-grey tabular crystal of Bournonite sits on edge in a...
Bournite with Pyrite
 Baia Sprie, Maramures Co, Romania, Europe
Fine well-formed characteristic crystals of Bournonite measuring to 9mm are neatly clustered over a...
 Herodsfoot Mine, Lanreath, Cornwall, England, Europe
Tabular twinned metallic silvery-grey crystals of Herodsfoot Mine Bournonite measuring to 2 cm, on a...