Tourmaline - Specimen land mammal Dioptase is a hydrated copper

Dioptase is a hydrated copper silicate mineral

Weight of 1 Mandrel: 2g

geologists working in the Sieroszowice copper-halite mine discovered very colourful and rich halite mineralization in one of the old tunnels

5cm x 2cm Approximate Weight of 1 piece: 100g

Tourmaline - Specimen land mammal Dioptase is a hydrated copperMined from: Cruzeiro Mine, So Jos da Safira, Minas Gerais, Brazil Description: This one of a kind Brazilian tourmaline specimen features thick, well developed prismatic crystals set in a dense quartz matrix. The tourmaline crystals range from deep forest green to nearly black, with strong longitudinal striations and a slightly glassy to submetallic luster. Several crystals run diagonally across the piece, creating a layered, structural look rather