XL Black Tourmaline Cluster | high quality raw black tourmaline crystal, protection stoneBlack tourmaline, otherwise known as schorl, is a prominent mineral found in Namibia, particularly in the Erongo Mountains region. This area is renowned for producing some of the worlds finest black tourmaline specimens, characterized by their deep black color, high luster, and well formed prismatic crystals. This is a large, high quality specimen featuring multiple interlocking crystals which have clustered together tightly. Size 12. 3 x 8. 5 Cm