mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Hardness: 5.5-6.0 Mohs; Color: Royal blue, grey, or white; Luster: Vitreous to greasy; Crystal Structure: Isometric (cubic); Cleavage: Poor/indistinct; Specific Gravity: 2.27-2.33.

Hardness: 5
Color: Royal blue, grey, or white
Luster: Vitreous to greasy

Identified June 19, 2026More mineral →

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Physical properties

Hardness: 5.5-6.0 Mohs; Color: Royal blue, grey, or white; Luster: Vitreous to greasy; Crystal Structure: Isometric (cubic); Cleavage: Poor/indistinct; Specific Gravity: 2.27-2.33.

Formation & geological history

Formed in sodium-rich igneous rocks (nepheline syenites and phonolites) and associated pegmatites. It is often found in massive form rather than distinct crystals.

Uses & applications

Primarily used as an ornamental gemstone for jewelry, sculptures, and architectural inlay. It is also a popular collector's mineral.

Geological facts

Sodalite is often mistaken for Lapis Lazuli, but unlike Lapis, Sodalite rarely contains pyrite and frequently features white calcite veining. Some specimens exhibit fluorescence under UV light.

Field identification & locations

Identify in the field by its intense blue color and lack of pyrite flecks. Common locations include Bancroft (Ontario, Canada), Namibia, Brazil, and Russia. It often leaves a white streak.