Bornite Value, Price, and Jewelry Information
Bornite is suitable only for cabochons. The bronzy color rapidly tarnishes in air to a magnificent iridescent color display, mostly purple, but also with blue and green tones. Bornite is too soft and brittle for anything but a collector curiosity, although cabochons are quite attractive when they tarnish. The material is not rare, so cabochons have no great value beyond the effort of cutting.
STREAK: Light grayish black.
OCCURRENCE: Low temperature copper deposits.
Bristol, Connecticut; Virginia; North Carolina; Montana; Arizona; Colorado; California
Canada; Chile; Peru; England; Italy; Germany; South Africa; Madagascar.
COMMENTS: Bornite is suitable only for cabochons. The bronzy color rapidly tarnishes in air to a magnificent iridescent color display, mostly purple, but also with blue and green tones. Bornite is too soft and brittle for anything but a collector curiosity, although cabochons are quite attractive when they tarnish. The material is not rare, so cabochons have no great value beyond the effort of cutting.
NAME: After Ignatius von Born, eighteenth-century mineralogist.
