Tourmalinated Quartz Sphere This sphere contains the powerful grounding crystal of Schorl, also known as Black Tourmaline. It is opaque and highly polished. This sphere is also well formed and very beautiful. The picture shows the exact item you will receive. Source: India Size: 4.1 inches in diameter. Weighs 1,831 grams. Black Tourmaline is a protective crystal that actually gives you a sense of power. It makes you feel secure, daring, and physically powerful. It will deepen your connection to the physical, natural world. It helps relieve you of fears specifically associated with your physical existence here on Earth. This is a crystal to have near you when you need protection and mental fortitude. Use this crystal when you need to feel safe and secure. Black Tourmaline is the ultimate grounding stone, and the primary crystal used for the clearing of negative energy and protection from spells.