mineral

Tumbled blue stone, possibly sodalite or blue quartz

Indeterminate from the photograph; possibilities include sodalite (Na₈Al₆Si₆O₂₄Cl₂) or blue quartz (SiO₂)

AI-generated identification · may be incorrect

Small polished/tumbled specimen with dark blue-gray color and subdued vitreous-to-waxy luster. Likely hardness about Mohs 5.5–7; crystal structure and cleavage cannot be determined visually here.

Identified August 17, 2026More mineral →

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At a glance

Common name: Tumbled blue stone, possibly sodalite or blue quartz
Scientific name: Indeterminate from the photograph; possibilities include sodalite (Na₈Al₆Si₆O₂₄Cl₂) or blue quartz (SiO₂)
Category: mineral
Identified: August 17, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 for a small common tumbled stone; $10–$50 if unusually attractive or confirmed as quality sodalite/blue quartz.

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

Small polished/tumbled specimen with dark blue-gray color and subdued vitreous-to-waxy luster. Likely hardness about Mohs 5.5–7; crystal structure and cleavage cannot be determined visually here.

Formation & geological history

If sodalite, it formed in silica-poor alkaline igneous rocks; if blue quartz, it formed as quartz in igneous or metamorphic veins. Geological age depends on its source locality.

Uses & applications

Used as a lapidary stone, craft material, cabochon, or inexpensive collector specimen; not suitable for major construction use.

Geological facts

The image is slightly out of focus and shows a rounded, polished piece, so a confident species identification is not possible. Color alone is insufficient because dyed stones and several blue minerals look similar.

Field identification & locations

Check streak, hardness, translucency, specific gravity, and reaction to acid; sodalite is commonly blue with white veining, while quartz scratches glass and has no cleavage. Common sources include Brazil, Canada, India, and Madagascar.