mineral

Blue sodalite bead strand

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, likely with minor hackmanite or associated minerals

AI-generated identification · may be incorrect

Deep royal-blue, granular to translucent beads with white-gray veining; vitreous to greasy luster and commonly massive rather than visibly crystalline. Mohs hardness 5.5–6, cubic crystal system, poor cleavage, and specific gravity about 2.25–2.35.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Forms in silica-poor, sodium-rich igneous rocks such as nepheline syenite and related alkaline complexes, generally during late-stage crystallization. Common deposits are geologically Precambrian to younger alkaline intrusions.

Uses & applications

Used as a decorative carving and jewelry stone, including beads, cabochons, and figurines; it is generally less valuable than lapis lazuli or high-grade sapphire.

Geological facts

Sodalite’s intense blue color comes mainly from sulfur-related defects and trace elements. White veining commonly consists of calcite or other feldspathoid-associated minerals.

Field identification & locations

Identify it by its opaque royal-blue color, relatively low hardness, white veining, and lack of pyrite flecks typical of lapis lazuli; a streak and acid test can help distinguish associated calcite. Major sources include Canada, Brazil, Namibia, and Russia.