Tourmaline

Tourmaline 
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Tourmaline is a fascinating mineral that can sometimes exhibit two or more colors. 
It is 7.5 on the Mohs??? scale and has no cleavage, making it suitable for many types of jewelry use.
Sometimes referred to as the “electric stone,” tourmaline becomes statically charged when heated or rubbed, attracting dust, lint and small pieces of paper.
Tourmaline possesses one of the widest color ranges, reproducing every conceivable color in the universe.
Tourmaline is fairly hard and durable, making it very wearable and an ideal gem for jewelry.