mineral

Tumbled dark-blue stone, possibly sodalite or dyed stone

Likely sodalite (Na₈Al₆Si₆O₂₄Cl₂); exact identification requires testing

AI-generated identification · may be incorrect

Opaque navy-blue, rounded and polished, with faint lighter mottling; likely Mohs 5.5–6, vitreous to waxy luster, no visible cleavage, granular crystal structure, and specific gravity around 2.2–2.4.

Identified August 30, 2026More mineral →

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At a glance

Common name: Tumbled dark-blue stone, possibly sodalite or dyed stone
Scientific name: Likely sodalite (Na₈Al₆Si₆O₂₄Cl₂); exact identification requires testing
Category: mineral
Identified: August 30, 2026
Method: Standard

AI Estimated Value

Approximately $1–$10 for a small common tumbled stone; $10–$30 if unusually attractive or confirmed as quality sodalite.

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

If sodalite, it formed in silica-poor, sodium-rich alkaline igneous rocks such as nepheline syenite, generally in relatively young igneous complexes. The smooth shape indicates human tumbling and polishing; dyeing or another blue stone cannot be excluded visually.

Uses & applications

Used primarily for inexpensive cabochons, beads, carvings, and lapidary specimens; it has little industrial or construction use.

Geological facts

Sodalite’s intense blue color may resemble lapis lazuli, but sodalite typically lacks abundant metallic-gold pyrite flecks. A white streak or hardness test can help distinguish it from softer dyed materials.

Field identification & locations

Common sources include Canada, Brazil, Namibia, and Russia. Check for uniform dye concentration in cracks, test streak on unglazed ceramic, and avoid destructive testing on valuable pieces.