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, pitch black color, vitreous luster, trigonal crystal system, and indistinct cleavage.
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Physical properties
Hardness of 7-7.5 on the Mohs scale, pitch black color, vitreous luster, trigonal crystal system, and indistinct cleavage.
Formation & geological history
Forms in pegmatites, hydrothermal veins, and metamorphic rocks under high-temperature conditions involving boron-rich fluids.
Uses & applications
Widely used in jewelry, metaphysical collections, and industrial applications due to its pyroelectric and piezoelectric properties.
Geological facts
Black tourmaline is known for its ability to absorb negative energy and is the most common variety of tourmaline found worldwide.
Field identification & locations
Easily identified by its deep black color, striated crystal prisms, and lack of good cleavage; commonly sourced from Brazil, India, and the USA.
