Location: Viboras Mine, Machacamarca subdistrict, Machacamarca mining district, Cornelio Saavedra Province, Potosí, Bolivia

Size: 3.13 x 1.89 x 1.61 inches

This specimen is a fairly rich example of the much sought after Bournonite that even has a cross shaped formation. I rarely get this species and when I do they are almost always in the triple digit price rage. Here is your chance to own an affordable specimen with bight minor pyrite from a small find in 2019.

Bournonite is a minor ore of copper and lead and is highly sought after by collectors (especially the twinned "cogwheels" formation. It generally forms in medium temperature hydrothermal vein deposits.