- Miniature, 4.3 x 4.0 x 3.9 cm
- Machacamarca Mine, Machacamarca, Machacamarca District (Colavi District), Cornelio Saavedra Province, Potosi Department, Bolivia
This is fine specimen of Bournonite from Bolivia. This piece hosts an attractive, sharp, somewhat blocky, metallic, silvery-grey color, lustrous, "cogwheel"-shaped crystal group measuring 2.0 x 1.9 cm sitting atop Pyrite matrix with minor associated micro Quartz. This specimen is from a find last year in Bolivia (2008) .