mineral

Blue sodalite-bearing rock

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, likely with feldspar and mica matrix

AI-generated identification · may be incorrect

Deep royal-blue, opaque, with white-gray patches and a sparkly tan matrix; vitreous to greasy luster, imperfect cleavage, commonly massive or granular, Mohs hardness 5.5–6, specific gravity about 2.2–2.4. The blue color and white veining resemble lapis lazuli, but visible pyrite is not apparent.

Identified September 8, 2026More mineral →

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Physical properties

Formation & geological history

Usually forms in silica-poor, sodium-rich igneous rocks such as nepheline syenite and related pegmatites through late magmatic crystallization. Most specimens are Precambrian to younger, depending on locality.

Uses & applications

Used as a decorative stone, cabochon material, beads, carvings, and ornamental slabs; lower-grade pieces are sold as mineral specimens.

Geological facts

Sodalite is a feldspathoid mineral and can fluoresce orange under long-wave ultraviolet light. It is commonly confused with lapis lazuli, which typically contains abundant golden pyrite.

Field identification & locations

Common localities include Canada, Brazil, Namibia, Russia, and Greenland. Identify it by its intense blue color, moderate hardness, white calcite-like veining, and lack of strong metallic pyrite; acid and UV tests can help but should be cautious.