mineral

Sodalite

Sodium aluminum silicate chloride (Na8(Al6Si6O24)Cl2)

Hardness: 5.5-6.0 on Mohs scale; Color: typically royal blue, often with white streaks or veins; Luster: vitreous to greasy; Crystal Structure: cubic/isometric (often massive); Cleavage: poor/indistinct; Specific Gravity: 2.2-2.3.

Hardness: 5
Color: typically royal blue, often with white streaks or veins
Luster: vitreous to greasy

Identified March 29, 2026More mineral →

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Physical properties

Formation & geological history

Formed primarily in igneous rocks that crystallized from sodium-rich magmas, such as nepheline syenites and phonolites. It can also form through contact metamorphism in calcareous rocks.

Uses & applications

Commonly used in jewelry as cabochons or beads, ornamental carvings, and interior decorative architectural elements like countertops or tiling. It is a popular 'healing crystal' in metaphysical circles.

Geological facts

Sodalite was first discovered by Europeans in Greenland in 1811, but it became famous when a large deposit was found in Ontario, Canada, in 1891 and used to decorate Marlborough House in London for a royal visit.

Field identification & locations

Identify in the field by its distinct royal blue color and the common presence of white calcite veins. Unlike Lapis Lazuli, it rarely contains golden pyrite specks and is lighter in weight. It is commonly found in Canada, Brazil, Namibia, and Russia.

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