Black Tourmaline CrystalEthically hand mined in Namibia 90mm ~ 3 3 4" ~ 212 gram A good sized semi polished natural Black Tourmaline crystal. You will receive the crystal pictured. Black Tourmaline is the first choice for protection from "ElectroSmog", the electromagnetic fields (EMFs) we are constantly bombarded with. The flat base makes it perfect for placing in front of electrical devices or in rooms to help shield us from the numerous frequencies we are constantly