mineral
Sodalite
Na8Al6Si6O24Cl2
AI-generated identification · may be incorrectHardness of 5.5 to 6 on the Mohs scale, royal blue color often mottled with white calcite veins, vitreous to greasy luster, and isometric crystal system.
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Physical properties
Hardness of 5.5 to 6 on the Mohs scale, royal blue color often mottled with white calcite veins, vitreous to greasy luster, and isometric crystal system.
Formation & geological history
Forms in sodium-rich igneous rocks such as nepheline syenites from cooling magma chambers.
Uses & applications
Used primarily as an ornamental stone, for lapidary carvings, and as low-cost gemstone jewelry.
Geological facts
Sodalite is heavily associated with white veins of calcite and can sometimes exhibit orange fluorescence under ultraviolet light.
Field identification & locations
Easily identified by its rich blue color and distinctive white streaks; commonly sourced from Canada, Greenland, and Brazil.
