mineral
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
AI-generated identification · may be incorrectHardness of 7 to 7.5 on the Mohs scale, deep black color, vitreous luster, and trigonal crystal system with prismatic habit.
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Physical properties
Hardness of 7 to 7.5 on the Mohs scale, deep black color, vitreous luster, and trigonal crystal system with prismatic habit.
Formation & geological history
Forms primarily in pegmatites, hydrothermal veins, and metamorphic rocks through high-temperature crystallization.
Uses & applications
Widely used in metaphysical practices, jewelry, and industrial applications due to its pyroelectric and piezoelectric properties.
Geological facts
Black tourmaline is prized for its strong natural shielding properties against electromagnetic fields and negative energy.
Field identification & locations
Easily identified in the field by its distinct striated prismatic crystals and lack of cleavage. Found globally, notably in Brazil, Pakistan, and the USA.
