mineral

Tumbled blue-gray stone, likely labradorite or sodalite

Possibly labradorite (plagioclase feldspar, approximately NaAlSi₃O₈–CaAl₂Si₂O₈) or sodalite (Na₈(Al₆Si₆O₂₄)Cl₂)

AI-generated identification · may be incorrect

Small polished/tumbled specimen with blue-gray coloration and darker matrix; likely vitreous to pearly luster and Mohs hardness about 5.5–6.5. The visible blue flash favors labradorite, though the image is insufficient for confident identification or confirmation of cleavage and specific gravity.

Identified August 26, 2026More mineral →

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At a glance

Common name: Tumbled blue-gray stone, likely labradorite or sodalite
Scientific name: Possibly labradorite (plagioclase feldspar, approximately NaAlSi₃O₈–CaAl₂Si₂O₈) or sodalite (Na₈(Al₆Si₆O₂₄)Cl₂)
Category: mineral
Identified: August 26, 2026
Method: Standard

AI Estimated Value

Approximately $2–$15 for a small common tumbled piece; $20–$100+ if it has strong labradorescence or exceptional color.

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

Labradorite forms in slowly cooled mafic igneous rocks such as anorthosite and gabbro; sodalite occurs in alkaline igneous rocks. These minerals formed during Precambrian to younger geological events, depending on locality.

Uses & applications

Used as a decorative tumbled stone, cabochon, and collector specimen; labradorite is popular in jewelry, while sodalite is commonly carved and polished.

Geological facts

Labradorite can display labradorescence—blue, green, or gold iridescent flashes caused by light interference in feldspar lamellae.

Field identification & locations

Test with a flashlight from different angles for strong iridescent flash; labradorite usually shows gray body color, whereas sodalite is more uniformly blue with white veining. Common sources include Madagascar, Finland, Canada, and Brazil.