mineral

Tumbled blue stone, likely sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; identification uncertain from image alone

AI-generated identification · may be incorrect

Opaque deep blue, matte-to-waxy luster, rounded tumbled form; Mohs hardness 5.5–6, cubic crystal system, poor cleavage, specific gravity about 2.2–2.4. Similar-looking materials include dyed jasper, dumortierite, or blue calcite.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Sodalite forms in silica-poor, alkaline igneous rocks such as nepheline syenite, generally during Precambrian to younger geological events. This specimen has been mechanically polished and rounded.

Uses & applications

Used as ornamental stone, beads, cabochons, carvings, and inexpensive collectible material; rarely used industrially.

Geological facts

Natural sodalite commonly has white calcite veining, though uniformly blue tumbled pieces may lack visible veining or be dyed. It is usually nonfluorescent to weakly orange under ultraviolet light.

Field identification & locations

Common sources include Canada, Brazil, Namibia, and Russia. Check for white veining, hardness, and a non-glassy texture; a scratch test or chemical testing is needed for confidence.