Tourmaline hardness, scoring 7 to 7.5 on the Mohs scale ... It’s great for making jewelry like black tourmaline bracelets and earrings because it can handle daily wear. It’s not easily ...

Since Black Tourmaline scores between 7 and 7.5 on the Mohs scale of mineral hardness, making it water resistant. The best way to clean Tourmaline is by using water, rather than ultrasonic and ...