mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Hardness: 5.5-6; Color: Navy to royal blue with white calcite veining; Luster: Vitreous to greasy; Crystal Structure: Isometric; Cleavage: Poor; Specific Gravity: 2.27-2.33

Hardness: 5
Color: Navy to royal blue with white calcite veining
Luster: Vitreous to greasy

Identified July 20, 2026More mineral →

Explore Sodalite in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 5.5-6; Color: Navy to royal blue with white calcite veining; 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, often through hydrothermal alternation. It is a member of the feldspathoid group.

Uses & applications

Primarily used as an ornamental gemstone, for carvings, beads, and architectural surfaces; also collected as mineral specimens.

Geological facts

Sodalite is often confused with Lapis Lazuli, but it lacks the gold-colored pyrite inclusions found in Lapis. It was first discovered in Greenland in 1811 and became popular after large deposits were found in Ontario, Canada during royal visits.

Field identification & locations

Look for a rich blue color with distinctive white streaks of calcite. Unlike Lapis Lazuli, it has a lower specific gravity and lacks pyrite. In the field, it is often found in alkaline igneous complexes. Major deposits are in Canada, Brazil, Namibia, and Russia.