mineral
Sodalite
Na8Al6Si6O24Cl2
AI-generated identification · may be incorrectHardness of 5.5 to 6 on the Mohs scale, deep royal blue color often veined with white calcite, vitreous to greasy luster, and isometric crystal system.
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Physical properties
Hardness of 5.5 to 6 on the Mohs scale, deep royal blue color often veined with white calcite, vitreous to greasy luster, and isometric crystal system.
Formation & geological history
Forms in silica-poor igneous rocks like nepheline syenites from sodium-rich magmas during late-stage crystallization.
Uses & applications
Widely used as an ornamental gemstone, for decorative carvings, and in lapidary work.
Geological facts
Sodalite is the main component of lapis lazuli and often fluoresces a bright orange-red under ultraviolet light.
Field identification & locations
Identified by its rich blue color and white calcite veins, commonly sourced from Canada, Greenland, and Brazil.
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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