mineral
Sodalite
Na8Al6Si6O24Cl2
AI-generated identification · may be incorrectHardness 5.5 to 6 on Mohs scale, royal blue to violet color with white calcite veins, vitreous luster, isometric crystal system.
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Physical properties
Hardness 5.5 to 6 on Mohs scale, royal blue to violet color with white calcite veins, vitreous luster, isometric crystal system.
Formation & geological history
Forms in sodium-rich igneous rocks like nepheline syenites from cooling magma chambers.
Uses & applications
Used mainly as an ornamental stone, for carved items, and in low-cost jewelry.
Geological facts
Sodalite fluoresces a bright orange-red under ultraviolet light and is named for its high sodium content.
Field identification & locations
Identified by its rich blue color and association with white veins; found worldwide including Canada, Greenland, and Brazil.
