mineral

Polished blue-gray stone, possibly labradorite or blue-gray granite

Uncertain from image; possible plagioclase-rich rock containing labradorite (NaAlSi₃O₈–CaAl₂Si₂O₈)

AI-generated identification · may be incorrect

Small, smoothly polished specimen with blue-gray to olive-brown coloration and reflective highlights. Likely Mohs hardness 6–6.5, vitreous to waxy luster, and no visible cleavage or crystal structure because the surface is polished.

Identified August 28, 2026More mineral →

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At a glance

Common name: Polished blue-gray stone, possibly labradorite or blue-gray granite
Scientific name: Uncertain from image; possible plagioclase-rich rock containing labradorite (NaAlSi₃O₈–CaAl₂Si₂O₈)
Category: mineral
Identified: August 28, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a small polished common specimen; $30–$100+ if strong labradorescence is confirmed.

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 labradorite-bearing, it formed by slow cooling of feldspar-rich igneous magma, commonly in Precambrian intrusive rocks. The specimen has been cut and polished; geological age cannot be determined visually.

Uses & applications

Used mainly as a decorative stone, cabochon, or mineral-collection specimen; labradorite is also used in jewelry and architectural accents.

Geological facts

The blue flash of labradorite is called labradorescence, produced by light interference within feldspar lamellae; the image does not show enough flash for confident identification.

Field identification & locations

Check for shifting blue, green, or gold flashes when tilted; test hardness against glass and inspect an unpolished edge for feldspar cleavage. Common sources include Madagascar, Finland, Canada, Norway, and the United States.