mineral

Polished blue glassy mineral specimen, likely sodalite or blue aventurine

Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph

AI-generated identification · may be incorrect

Deep navy-blue, opaque to translucent material with a vitreous-to-waxy luster and irregular polished surface. Sodalite has Mohs hardness 5.5–6, cubic crystal structure, poor cleavage, and specific gravity about 2.2–2.4; visible sparkly reflections may be polishing rather than crystal faces.

Identified August 22, 2026More mineral →

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At a glance

Common name: Polished blue glassy mineral specimen, likely sodalite or blue aventurine
Scientific name: Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph
Category: mineral
Identified: August 22, 2026
Method: Standard

AI Estimated Value

$5–$30 for a small polished common piece; $30–$100+ if confirmed high-quality sodalite, while dyed stone or glass may be worth under $10.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Sodalite forms in silica-poor, sodium-rich igneous rocks such as nepheline syenite, generally during Precambrian to younger alkaline magmatic events. Common blue quartzite or dyed lapidary material would instead be metamorphic or human-treated.

Uses & applications

Used for cabochons, beads, carvings, ornamental stone, and collectors’ specimens; blue quartzite is used similarly. Value is mainly decorative rather than industrial.

Geological facts

The image is insufficient for confident mineral identification; the smooth, intensely uniform blue appearance could also indicate dyed stone or man-made glass.

Field identification & locations

Check for bubbles or perfectly conchoidal fracture (glass), white calcite veining and natural granular texture (sodalite), and hardness: sodalite scratches glass weakly, while glass generally does not scratch it. Common sodalite sources include Canada, Brazil, Namibia, and Russia.