BLT193 Black Tourmaline Intarsia Beads Additionally the rock can contain

Additionally the rock can contain tube formations

5 to 7 on the Mohs Scale

darker than green aventurine from India

5 on the Mohs hardness scale

This polished specimen was item #55 on the Willow Creek Jasper Live @ 5 from November 2020

BLT193 Black Tourmaline Intarsia Beads Additionally the rock can containBlack 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