mineral
Tourmaline
Complex boron silicate (Tourmaline Group)
AI-generated identification · may be incorrectHardness 7-7.5 on Mohs scale, vibrant green to blue-green colors, vitreous luster, trigonal crystal system with distinct striated prism faces.
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Physical properties
Hardness 7-7.5 on Mohs scale, vibrant green to blue-green colors, vitreous luster, trigonal crystal system with distinct striated prism faces.
Formation & geological history
Formed in pegmatites and hydrothermal veins through the crystallization of magma rich in water and boron.
Uses & applications
Widely used in high-end jewelry, metaphysical collections, and piezoelectric industrial applications.
Geological facts
Tourmaline exhibits pyroelectricity and piezoelectricity, meaning it generates an electrical charge when heated or subjected to mechanical pressure.
Field identification & locations
Readily identified by its characteristic triangular cross-section and vertical striations along the prism length; commonly sourced from Brazil, Afghanistan, and Africa.
