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, and conchoidal fracture.
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Physical properties
Hardness of 7-7.5 on the Mohs scale, black color, vitreous to submetallic luster, trigonal crystal system, and conchoidal fracture.
Formation & geological history
Forms in pegmatites, hydrothermal veins, and metamorphic rocks through high-temperature crystallization from boron-rich fluids.
Uses & applications
Widely used in metaphysical healing, jewelry, and industrial applications for its piezoelectric and pyroelectric properties.
Geological facts
Black tourmaline is renowned for its strong natural electrical properties and is often used to repel negative energy.
Field identification & locations
Easily identified in the field by its deep black color, prismatic striations, and lack of cleavage; found globally, with major deposits in Brazil, Africa, and the USA.
