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, black color, vitreous to submetallic luster, and trigonal crystal system with distinct prismatic striated columns.
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Physical properties
Hardness of 7 to 7.5 on the Mohs scale, black color, vitreous to submetallic luster, and trigonal crystal system with distinct prismatic striated columns.
Formation & geological history
Forms in pegmatites, hydrothermal veins, and metamorphic rocks through high-temperature crystallization processes.
Uses & applications
Used in metaphysical collections, jewelry, and piezoelectric or pyroelectric industrial applications.
Geological facts
Black tourmaline is well known for its strong pyroelectric properties, meaning it can generate an electrical charge when heated or cooled.
Field identification & locations
Identified easily by its triangular cross-section and deep striations; commonly sourced from Brazil, Pakistan, and the USA.
