mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Hardness: 5.5-6 (Mohs scale); Color: Royal blue to greyish-blue with white/pinkish veins; Luster: Vitreous to greasy; Crystal Structure: Isometric; Cleavage: Poor; Specific Gravity: 2.27-2.33

Hardness: 5
Color: Royal blue to greyish-blue with white/pinkish veins
Luster: Vitreous to greasy

Identified March 15, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 5.5-6 (Mohs scale); Color: Royal blue to greyish-blue with white/pinkish veins; Luster: Vitreous to greasy; Crystal Structure: Isometric; Cleavage: Poor; Specific Gravity: 2.27-2.33

Formation & geological history

Formed in silica-poor igneous rocks such as nepheline syenites and phonolites through late-stage hydrothermal processes. Can also occur in contact metamorphosed limestones.

Uses & applications

Used primarily for ornamental carvings, beads, and cabochons in jewelry. In industry, it is sometimes used as a decorative building stone (Blue Sodalite granite).

Geological facts

Sodalite was first discovered in Greenland in 1811 but became famous in 1891 when large deposits were found in Ontario, Canada. It is often nicknamed 'Princess Blue' in honor of Princess Margaret of England.

Field identification & locations

Identify by its deep blue color and characteristic white calcite veins. Unlike Lapis Lazuli, it rarely contains gold-colored pyrite specks. Found commonly in Brazil, Namibia, Canada (Bancroft), and Russia.