Join our mailing list below to download a FREE gem ID checklist tutorial. Tourmaline comes in a wide variety of types and colors. Watermelon Tourmaline is usually cut into beads to fit bracelets and earrings or cabochons, a flat back with a rounded dome to fit in pendants and rings. Some like bi-colored tourmalines for an engagement ring stone as a representation of two souls becoming one. When sold, these irradiated gems are not radioactive and won’t have any negative effects on your health. Ready to learn how to identify gems on your own? However, this material can be carved into beautiful objects. 99.