Black Tourmaline, Obsidian and Onyx: 6mm, 8mm and 10mm. Solid Skull and Compass pendant in Sterling Silver and Black Rhodium and White Rhodium with Brilliant Cut Blue Sapphire 28 pieces-0.38 crt. Clasp in Sterling Silver, octagonal hand hammered clasp lock with Black Rhodium. Authentic Compass-Jewelry logo bead. Stretch bracelet strung on strong rubber. Obsidian: Reduces negative mental or spiritual influences and absorbs negative energy from the environment radiation, 5G, etc.). Black Tourmaline: Enhance the positive energy within us. Black Onyx: Stimulates analytical thinking. It also helps to balance your body and mind. Sapphire: Prosperity, inner peace. Black Diamond: represents inner strength and power.