gemstone

Pink-red faceted gemstone, possibly synthetic corundum or spinel

Uncertain; possible ruby (corundum, Al₂O₃) or red spinel (MgAl₂O₄)

AI-generated identification · may be incorrect

Small transparent-to-translucent, step/faceted-cut stone with pink-red color and vitreous luster. Ruby hardness is Mohs 9; spinel is 7.5–8. The image cannot reliably establish identity, natural origin, clarity, or treatments.

Identified September 14, 2026More gemstone →

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At a glance

Common name: Pink-red faceted gemstone, possibly synthetic corundum or spinel
Scientific name: Uncertain; possible ruby (corundum, Al₂O₃) or red spinel (MgAl₂O₄)
Category: gemstone
Identified: September 14, 2026
Method: Standard

AI Estimated Value

About $1–$20 if glass or synthetic; $20–$300 for a small commercial natural spinel/garnet; roughly $50–$1,000+ for natural ruby depending on treatment, clarity, color, 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

If corundum, it formed in aluminum-rich metamorphic rocks or alluvial deposits; if spinel, commonly in metamorphic rocks and placers. Natural stones may be geologically old, while synthetic stones are laboratory-grown and potentially inexpensive.

Uses & applications

Used in jewelry and gem collecting. Ruby generally commands higher prices; synthetic corundum or glass may have little market value.

Geological facts

Its rectangular step-cut appearance and uniform pink-red color are consistent with several materials, including ruby, pink sapphire, spinel, synthetic corundum, garnet, or glass.

Field identification & locations

Test with a loupe for inclusions, check refractive index and specific gravity, and use a qualified gemologist for origin/treatment testing; do not rely on color alone. Sabah near 5.9°N, 116.1°E has placer and metamorphic mineral occurrences, but this cut stone cannot be regionally identified from the photograph.