mineral

Polished blue stone, likely sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue-dyed jasper or lapis lazuli

AI-generated identification · may be incorrect

Opaque blue, fine-grained, polished with vitreous-to-waxy luster; sodalite hardness 5.5–6, cubic structure, poor cleavage, and specific gravity about 2.3. The image alone cannot distinguish sodalite confidently from lapis lazuli or dyed material; white-gray veining and abundant pyrite would favor lapis.

Identified August 8, 2026More mineral →

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At a glance

Common name: Polished blue stone, likely sodalite
Scientific name: Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue-dyed jasper or lapis lazuli
Category: mineral
Identified: August 8, 2026
Method: Standard

AI Estimated Value

About $5–$25 for a small polished sodalite cabochon; approximately $10–$100 if confirmed high-quality lapis or an uncommon collectible specimen.

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, alkaline igneous rocks such as nepheline syenite, generally in Precambrian to younger alkaline complexes. Lapis lazuli forms metamorphically in marble, while blue jasper is silica-rich and commonly sedimentary or volcanic-derived.

Uses & applications

Used as a decorative stone, cabochon, bead, carving material, and inexpensive jewelry stone; lapis lazuli has additional ornamental and historical pigment use.

Geological facts

Natural sodalite is typically royal to denim blue with white calcite veining and usually lacks visible metallic pyrite. A saturated, uniform blue color may indicate dyeing.

Field identification & locations

Common sources include Canada, Brazil, Namibia, and Russia; lapis is especially associated with Afghanistan and Chile. Check hardness, streak, magnification, and dye concentration in cracks; avoid acid or destructive tests.