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 to submetallic luster, and distinct striated prismatic crystal columns.
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Physical properties
Hardness of 7-7.5 on the Mohs scale, pitch black color, vitreous to submetallic luster, and distinct striated prismatic crystal columns.
Formation & geological history
Forms in pegmatites, hydrothermal veins, and metamorphic rocks through high-temperature crystallization.
Uses & applications
Used in jewelry, metaphysical collections, and industrial applications due to its pyroelectric and piezoelectric properties.
Geological facts
Black tourmaline is well known for its strong natural electrical properties and is often called schorl, the most common tourmaline variety.
Field identification & locations
Easily identified in the field by its triangular cross-section, deep vertical striations, and lack of cleavage.
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