mineral
Tourmaline
Schorl (Sodium iron(II) aluminum borosilicate)
AI-generated identification · may be incorrectHardness 7-7.5 on the Mohs scale, black color, vitreous to submetallic luster, trigonal crystal system, conchoidal fracture.
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Physical properties
Hardness 7-7.5 on the Mohs scale, black color, vitreous to submetallic luster, trigonal crystal system, conchoidal fracture.
Formation & geological history
Formed in pegmatites and hydrothermal veins through high-temperature crystallization from cooling magma.
Uses & applications
Used in jewelry, metaphysical collections, and industrial applications requiring piezoelectric 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 characteristic prismatic crystal habit with striated vertical faces and lack of cleavage.
