BLT193 Black Tourmaline Intarsia Beads Aquamarine is the birthstone for

Aquamarine is the birthstone for March

it makes superb cabochons and takes an exceptional polish

Additionally the rock can contain tube formations

and is fairly irregularly shaped

4 cm x 5 cm x 3

BLT193 Black Tourmaline Intarsia Beads Aquamarine is the birthstone forBlack Tourmaline crystal with termination. 3. 5" x 3" x 2. 5" 1. 55 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