mineral
Black Tourmaline
Schorl (NaFe3Al6(Si6O18)(BO3)3(OH)4)
AI-generated identification · may be incorrectHardness of 7-7.5 on Mohs scale, deep black color, vitreous to submetallic luster, trigonal crystal system, and conchoidal fracture.
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Physical properties
Hardness of 7-7.5 on Mohs scale, deep black color, vitreous to submetallic luster, trigonal crystal system, and conchoidal fracture.
Formation & geological history
Forms in pegmatites, hydrothermal veins, and metamorphic rocks under high-temperature conditions.
Uses & applications
Used in jewelry, metaphysical collections, and industrial applications due to its pyroelectric properties.
Geological facts
Schorl is the most common variety of tourmaline, accounting for about 95% of all tourmaline in nature.
Field identification & locations
Identified by its distinctive striated prismatic crystal faces and lack of cleavage; common worldwide.
