Black Tourmaline is a naturally occurring borosilicate mineral recognized for its deep black color and distinctive striated crystal structure. Typically forming elongated, prismatic crystals, this specimen showcases the durability and complexity of one of the most well-known members of the tourmaline group. Ideal for collectors, students, and geology enthusiasts, it provides a clear example of crystal formation in igneous and metamorphic rocks.nWhy You’ll Love ThisnnDeep black, vertically striated prismatic crystals typical of natural black tourmalinenDurable and long-lasting, perfect for display or studynNaturally forms in granite pegmatites, hydrothermal veins, and metamorphic rocksnExcellent for educational purposes, demonstrating mineral composition, crystal systems, and growth patternsnA striking addition to any mineral collection or scientific study setnnExplore the intricate crystal structure and natural beauty of this scientifically significant black tourmaline specimen.