gemstone

Faceted gemstones, likely mixed small sapphires or spinel

Corundum (Al₂O₃) or spinel (MgAl₂O₄); exact identification requires testing

AI-generated identification · may be incorrect

Small transparent-to-translucent faceted stones with vitreous luster, gray-blue to purplish and colorless tones. Sapphire hardness is Mohs 9; spinel is Mohs 8; both have nonmetallic luster and distinct crystal structures.

Identified September 14, 2026More gemstone →

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At a glance

Common name: Faceted gemstones, likely mixed small sapphires or spinel
Scientific name: Corundum (Al₂O₃) or spinel (MgAl₂O₄); exact identification requires testing
Category: gemstone
Identified: September 14, 2026
Method: Standard

AI Estimated Value

Approximately $5–$100 per small commercial stone; fine natural sapphire or spinel may range from $100 to several thousand dollars per carat, depending on color, clarity, treatment, and certification.

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

Natural corundum and spinel crystallize in metamorphic rocks and some igneous deposits, commonly in marble, schist, or placer gravels. Geological ages vary widely, generally millions to billions of years.

Uses & applications

Used as jewelry gemstones and collector specimens; sapphire is also used industrially for scratch-resistant windows and abrasives.

Geological facts

The photograph shows multiple cut stones mounted or displayed on a board, not a single rock specimen. Color and faceting alone cannot reliably distinguish sapphire from spinel or glass.

Field identification & locations

Check refractive index, birefringence, inclusions, and hardness; a gemological loupe and refractometer are useful, while scratch testing may damage them. Common sources include Sri Lanka, Myanmar, Madagascar, Tanzania, and Vietnam.