It is commonly found in trigonal crystal systems and is made up of Sodium Iron Aluminum Borate Silicate. The stone is black. Black Tourmaline means grounding and protection.
There are many shades of Tourmaline, but none hold the protective powers associated with Black Tourmaline. Formed where steamy waters and minerals move through pockets of the earth, this stone is deeply enriched with iron and manganese, both of which help grant Black Tourmaline the charging and magnetic properties that make it such a vital tool in your grounding box.