Sodalite

Physical Properties

Hardness: 5.5-6 (Mohs scale), Color: Royal blue with white calcite streaks, Luster: Vitreous to greasy, Crystal structure: Cubic, Cleavage: Poor, Specific gravity: 2.27-2.33

Formation & Geological History

Found in igneous rocks that crystallized from sodium-rich magmas (nepheline syenites) and sometimes in contact metamorphic rocks.

Uses & Applications

Ornamental carvings, jewelry, tumbled stones, and occasionally used as a blue pigment.

Geological Facts

Sodalite was first discovered in Greenland in 1811 but became popular in 1891 when large deposits were found in Ontario, Canada, during a royal visit; it is sometimes called 'Princess Blue'.

Field Identification & Locations

Look for the characteristic deep blue color often paired with white veins of calcite. Unlike Lapis Lazuli, it rarely contains gold-colored pyrite specks. Found in Canada, Brazil, and Namibia.

Identified on: 5/10/2026

Mode: Standard