mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Hardness: 5.5-6.0 Mohs; Color: Royal blue to grey-blue with white calcite inclusions; Luster: Vitreous to greasy; Crystal structure: Cubic (Isometric); Specific gravity: 2.27-2.33.

Hardness: 5
Color: Royal blue to grey-blue with white calcite inclusions
Luster: Vitreous to greasy

Identified July 1, 2026More mineral →

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Physical properties

Hardness: 5.5-6.0 Mohs; Color: Royal blue to grey-blue with white calcite inclusions; Luster: Vitreous to greasy; Crystal structure: Cubic (Isometric); Specific gravity: 2.27-2.33.

Formation & geological history

Formed in silica-poor igneous rocks such as nepheline syenites or phonolites. It can also form in contact metamorphic environments. Prominent deposits are found in Canada (Bancroft), Namibia, and Brazil.

Uses & applications

Used primarily as a gemstone in jewelry (cabochons, beads), decorative carvings, ornamental stones, and as a collector's specimen. It is also sold for metaphysical purposes as a 'crystal tower'.

Geological facts

Sodalite was first discovered in Greenland in 1811 but became commercially important after large deposits were found in Ontario, Canada, in 1901. It is often confused with Lapis Lazuli, but unlike Lapis, Sodalite rarely contains golden pyrite specks.

Field identification & locations

Identified in the field by its rich blue color and association with white calcite veins. Unlike similar minerals, it will typically fluoresce a bright orange-red or pink under UV light. It is lighter in weight than Lapis Lazuli and lacks the sulfur smell when scratched.