Sodalite

Physical Properties

Hardness: 5.5-6 on Mohs scale; Color: Deep blue to violet-blue with white streaks; Luster: Vitreous to greasy; Crystal Structure: Isometric (cubic); Cleavage: Poor; Specific Gravity: 2.27-2.33.

Formation & Geological History

Forms in silica-poor igneous rocks such as nepheline syenites and phonolites, as well as in contact metamorphic rocks. It crystallizes from magma that is rich in sodium and aluminum but deficient in silica.

Uses & Applications

Primarily used as a decorative stone, in jewelry (beads, cabochons), and for metaphysical or collecting purposes. It is also used occasionally in industry as a source of pigments.

Geological Facts

Sodalite is often mistaken for Lapis Lazuli, but unlike Lapis, it rarely contains golden pyrite inclusions. It is famously found at the Princess Sodalite Mine in Canada, named after Princess Margaret of England who fell in love with the stone.

Field Identification & Locations

Identify by its rich blue color and characteristic white calcite veins. Unlike similar stones, it will often fluoresce orange under short-wave UV light. Common locations include Canada (Bancroft), Brazil, Namibia, and Greenland.

Identified on: 4/29/2026

Mode: Standard