• Bournonite
  • Bournonite
  • Bournonite
  • Bournonite
Sulphides, Sulphosalts and Arsenides


$900.00   €807  £680.00 approx.  

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

ID: CC19964
Intergrown cog-like crystals of Bournonite with a little attached granular Quartz and Limonite from the Viboras mine in the Machacamarca mining district of Cornelio Saavedra Province, Bolivia.  The Bournonite forms excellent classic cog wheels of gunmetal-grey with a bright metallic lustre.  The largest crystal measures 2.9 cm long x 0.9 cm wide and up to 2 cm deep and is joined with two sub-parallel, similar but smaller crystals.  A superb example of Bournonite, commonly known as “cog-wheel ore”.


4.2 × 2.7 × 2.2 cm
Sulphides, Sulphosalts and Arsenides
Viboras Mine, Machacamarca, Machacamarca District, Cornelio Saavedra Province, Potosí Department, Bolivia

Minerals on Specimen

Minerals on specimen

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