BLT197 Black Tourmaline Citrine Feldspar features a mixture of

Feldspar features a mixture of stones from the felspar family

along with numerous diagrams and illustrations

Handy Display Tray

this homogeneous nephrite jade has a brown/orange crust with black interior

Packed with detailed information on recognition

BLT197 Black Tourmaline Citrine Feldspar features a mixture ofBlack Tourmaline crystal with termination. 2. 5" x 1. 5" x 3" 1. 25 lb Black Tourmaline is also called Schorl, and accounts for ninety five percent of all Tourmaline in nature. It is black, or sometimes a deep blue that appears black. The term Schorl was in use before the 1400s, named for a town in Saxony, Germany, where Black Tourmaline was found in nearby tin mines. Black Tourmaline belongs to a complex family of aluminum borosilicate mixed with