mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Hardness: 5.5-6.0; Color: Blue-grey with white veins (calcite); Luster: Vitreous to greasy; Crystal Structure: Isometric; Cleavage: Poor; Specific Gravity: 2.27-2.33

Hardness: 5
Color: Blue-grey with white veins (calcite)
Luster: Vitreous to greasy

Identified June 7, 2026More mineral →

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Physical properties

Hardness: 5.5-6.0; Color: Blue-grey with white veins (calcite); Luster: Vitreous to greasy; Crystal Structure: Isometric; Cleavage: Poor; Specific Gravity: 2.27-2.33

Formation & geological history

Forms in igneous rocks that crystallized from sodium-rich magmas (nepheline syenites and phonolites); often associated with metasomatic processes.

Uses & applications

Used primarily for ornamental purposes, jewelry (beads and cabochons), and as a decorative stone in carvings or tabletops.

Geological facts

Sodalite is often mistaken for Lapis Lazuli, but it lacks the golden pyrite flecks common in Lapis and is much less expensive.

Field identification & locations

Identify by its rich blue color and characteristic white calcite veins. Unlike many other blue minerals, it will fluoresce orange under short-wave UV light. Common localities include Canada and Brazil.