This deep black tourmaline has incredible striation, making it collection worthy.
Tourmaline is one of the birthstones for October. It is the name of a large group of boron silicate minerals, which share common crystal structure. However, despite the similarity in physical properties, tourmaline occurs in a broad range of colors.
Size: ~ 2.5 x 1 x 1 inches
Weight: ~ 3 oz.