Sodalite

Physical Properties

Hardness: 5.5-6.0 Mohs; Color: Deep blue, royal blue, or white/pink inclusions; Luster: Vitreous to greasy; Crystal Structure: Isometric/Cubic; Cleavage: Poor; Specific Gravity: 2.27-2.33

Formation & Geological History

Formed in silica-poor igneous rocks such as nepheline syenites and phonolites. It typically occurs in plutonic environments where magma cools slowly beneath the surface.

Uses & Applications

Used primarily as a gemstone, decorative carved objects, cabochons for jewelry, and occasionally as architectural stone or tiles for interior design.

Geological Facts

Sodalite is often mistaken for Lapis Lazuli, but unlike Lapis, Sodalite rarely contains pyrite specks and has a lower specific gravity. It is known as the 'Poet's Stone' in metaphysical circles.

Field Identification & Locations

Identified in the field by its intense blue color and association with white calcite veins. Unlike Lapis Lazuli, it often has a distinctive white streak. Major deposits are found in Bancroft (Ontario), Brazil, and Greenland.

Identified on: 5/3/2026

Mode: Standard