mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Hardness: 5.5-6.0 Mohs; Color: Royal blue, mottled with white veins or grey patches; Luster: Vitreous to greasy; Crystal structure: Cubic (dodecahedral); Specific gravity: 2.2-2.3.

Hardness: 5
Color: Royal blue, mottled with white veins or grey patches
Luster: Vitreous to greasy

Identified June 3, 2026More mineral →

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Physical properties

Hardness: 5.5-6.0 Mohs; Color: Royal blue, mottled with white veins or grey patches; Luster: Vitreous to greasy; Crystal structure: Cubic (dodecahedral); Specific gravity: 2.2-2.3.

Formation & geological history

Forms in silica-poor igneous rocks (nepheline syenites and phonolites) and some contact metamorphic rocks. Primary source localities include Canada, Namibia, and Brazil.

Uses & applications

Used primarily for decorative carvings, cabochon jewelry, beads, and as as architectural facing or dimension stone.

Geological facts

Sodalite is a member of the sodalite group and is often confused with Lapis Lazuli, but Sodalite lacks the golden pyrite inclusions typically found in high-grade Lapis.

Field identification & locations

Identify by its deep blue color and white calcite veins; it is sensitive to acid and can be distinguished from Lapis by its lower density and lack of pyrite. Found frequently in pegmatites.