mineral
Schorl (Black Tourmaline)
Schorl (NaFe3Al6(Si6O18)(BO3)3(OH)4)
AI-generated identification · may be incorrectHardness of 7 to 7.5 on the Mohs scale, black color, vitreous luster, and prismatic crystal habit with distinct striations.
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Physical properties
Hardness of 7 to 7.5 on the Mohs scale, black color, vitreous luster, and prismatic crystal habit with distinct striations.
Formation & geological history
Forms primarily in pegmatites, hydrothermal veins, and metamorphic rocks through high-temperature fluid crystallization.
Uses & applications
Used in metaphysical collections, jewelry, and industrial applications for its piezoelectric and pyroelectric properties.
Geological facts
Tourmaline has one of the most complicated crystal chemistry structures of any silicate mineral group.
Field identification & locations
Identified by its characteristic triangular cross-section, lack of cleavage, and vertical striations on the crystal faces.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous