This piece of black tourmaline is a beautifully formed whole crystal with a terminated end. The striations along the length of the crystal are vivid and defined. 

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. 

Morocco

Size: 2 x 1.38 x 1 inches

Weight: ~ 4oz.