gemstone

Yellow faceted gemstone, likely citrine or yellow sapphire

Citrine: quartz, SiO₂; yellow sapphire: corundum, Al₂O₃

AI-generated identification · may be incorrect

Transparent yellow, vitreous luster, and faceted/cabochon-cut appearance. Citrine has Mohs hardness 7 and specific gravity ~2.65; yellow sapphire has hardness 9 and specific gravity ~4.0, but the blurred image cannot distinguish them reliably.

Identified September 13, 2026More gemstone →

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At a glance

Common name: Yellow faceted gemstone, likely citrine or yellow sapphire
Scientific name: Citrine: quartz, SiO₂; yellow sapphire: corundum, Al₂O₃
Category: gemstone
Identified: September 13, 2026
Method: Standard

AI Estimated Value

About $5–$50 if common citrine; $100–$1,000+ for quality natural yellow sapphire, with laboratory testing and treatment disclosure required.

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

Citrine forms in silica-rich hydrothermal environments, commonly as heat-treated amethyst; sapphire crystallizes in aluminum-rich igneous or metamorphic rocks. Both are geologically ancient, generally formed over millions to billions of years.

Uses & applications

Used primarily in jewelry and mineral collections; citrine is relatively affordable, while fine natural yellow sapphire can be valuable.

Geological facts

Strong yellow-orange color may indicate heat-treated quartz, often sold as citrine. Sapphires usually show greater brilliance and durability, but visual inspection alone is insufficient.

Field identification & locations

Confirm with a refractometer, polariscope, specific-gravity test, and loupe examination; avoid scratching the stone. Citrine is common in Brazil, Uruguay, and Madagascar; yellow sapphire occurs in Sri Lanka, Madagascar, Thailand, and Tanzania.