Bornite ”Peacock Ore” black tourmaline high- silica purity and a

high- silica purity and a brilliant

it is mined for the production of sulphuric acid for the chemistry and fertilizer industry

This item is 4” x 2” and weighs 7

This delicate specimen features a sparkling layer of fine

72" and weighs 101 grams

Bornite ”Peacock Ore” black tourmaline high- silica purity and aBornite is a copper iron sulfide mineral also known as peacock ore for its striking iridescent tarnish (blues, purples, reds) that develops on its fresh bronze brown surface as it oxidizes, making it an important copper ore, found in hydrothermal deposits, valued for copper extraction, and identified by its unique color change and metallic luster. This item is 2. 5 x 1. 5 and weighs 4. 95 oz.