mineral
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
AI-generated identification · may be incorrectHardness of 7-7.5 on the Mohs scale, black color, vitreous to submetallic luster, trigonal crystal system with striated prismatic crystals, and conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7-7.5 on the Mohs scale, black color, vitreous to submetallic luster, trigonal crystal system with striated prismatic crystals, and conchoidal fracture with no true cleavage.
Formation & geological history
Forms primarily in pegmatites, hydrothermal veins, and metamorphic rocks like schists and gneisses through high-temperature fluid crystallization.
Uses & applications
Widely used in jewelry, metaphysical collections, and industrial applications due to its piezoelectric and pyroelectric properties.
Geological facts
Ancient magicians reportedly used black tourmaline to protect against earth demons, and it is known for naturally holding an electrical charge.
Field identification & locations
Easily identified by its characteristic triangular cross-section, deep vertical striations on the prism faces, and lack of cleavage. Commonly sourced from Brazil, Pakistan, and the USA.
