Mineral

Sodalite

Sodalite (Sodium Aluminum Silicate Chloride), Na8(Al6Si6O24)Cl2

Hardness: 5.5-6 (Mohs scale); Color: Royal blue to grey-blue with white calcite inclusions; Luster: Vitreous to greasy; Crystal Structure: Isometric; Cleavage: Poor/Indistinct; Specific Gravity: 2.27-2.33

Hardness: 5
Color: Royal blue to grey-blue with white calcite inclusions
Luster: Vitreous to greasy

Identified March 28, 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. It often occurs in hydrothermal veins or as a late-stage mineral in alkaline volcanic environments.

Uses & applications

Commonly used as a gemstone for beads and cabochons, ornamental carvings, and architectural finishing (slabs for decorative walls or countertops). It is also a popular specimen for mineral collectors.

Geological facts

Sodalite is often nicknamed 'Poor Man's Lapis' because of its similar color but lacks the gold pyrite flecks found in Lapis Lazuli. It was famously discovered in Greenland in 1811 and became popular after a large deposit was found in Ontario during a royal visit by Princess Margaret.

Field identification & locations

Identify in the field by its deep blue color and white veins (calcite). Unlike Lapis Lazuli, it almost never contains brassy pyrite. Under long-wave UV light, many specimens exhibit a strong orange or pink fluorescence. Found in Canada (Princess Sodalite Mine), Brazil, Namibia, and Russia.

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