mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Hardness: 5.5-6.0 Mohs; Color: Royal blue to violet-blue, often with white streaks; Luster: Vitreous to greasy; Crystal Structure: Isometric (cubic); Cleavage: Poor; Specific Gravity: 2.27-2.33.

Hardness: 5
Color: Royal blue to violet-blue, often with white streaks
Luster: Vitreous to greasy

Identified July 3, 2026More mineral →

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Physical properties

Hardness: 5.5-6.0 Mohs; Color: Royal blue to violet-blue, often with white streaks; Luster: Vitreous to greasy; Crystal Structure: Isometric (cubic); Cleavage: Poor; Specific Gravity: 2.27-2.33.

Formation & geological history

Forms in sodium-rich igneous rocks such as nepheline syenites or phonolites, and occasionally in contact metamorphosed marbles. It is a member of the feldspathoid group.

Uses & applications

Primarily used as an ornamental gemstone, for figurines, cabochons for jewelry, and as architectural stone for countertops or tiles.

Geological facts

Sodalite is often mistaken for Lapis Lazuli, but unlike Lapis, Sodalite rarely contains pyrite flecks and is less dense. Most of the world's commercial supply comes from Canada and Brazil.

Field identification & locations

Identify in the field by its rich blue color and white calcite veining. It often fluoresces a bright orange-red under long-wave UV light. Major locations include Ontario (Canada), Brazil, Namibia, and Russia.