mineral
Green Tourmaline
Elbaite, Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4
AI-generated identification · may be incorrectHardness of 7-7.5 on Mohs scale, vibrant green color, vitreous luster, trigonal crystal system, indistinct cleavage, specific gravity of 3.0-3.2.
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Physical properties
Hardness of 7-7.5 on Mohs scale, vibrant green color, vitreous luster, trigonal crystal system, indistinct cleavage, specific gravity of 3.0-3.2.
Formation & geological history
Forms in pegmatites and hydrothermal veins through crystallization of magma enriched in lithium, boron, and water.
Uses & applications
Used primarily as a gemstone in high-end jewelry and valued by mineral collectors for its crystal habit.
Geological facts
Tourmalines exhibit strong pleochroism, often showing different colors or depths of color when viewed from different angles.
Field identification & locations
Identified by its characteristic prismatic crystal shape with vertical striations and triangular cross-section. Found globally, notably in Brazil, Madagascar, and the USA.
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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