gemstone

Yellow faceted gemstone, likely citrine or yellow sapphire

Uncertain from image; citrine is quartz (SiO₂), while yellow sapphire is corundum (Al₂O₃)

AI-generated identification · may be incorrect

Small transparent yellow oval/faceted stone with vitreous luster. Citrine has Mohs hardness 7 and no cleavage; sapphire has hardness 9 and basal parting. Internal inclusions and apparent rounded/faceted cutting are visible.

Identified September 13, 2026More gemstone →

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At a glance

Common name: Yellow faceted gemstone, likely citrine or yellow sapphire
Scientific name: Uncertain from image; citrine is quartz (SiO₂), while yellow sapphire is corundum (Al₂O₃)
Category: gemstone
Identified: September 13, 2026
Method: Standard

AI Estimated Value

Approximately $5-$50 if citrine or treated quartz; $50-$500+ if natural yellow sapphire, depending heavily on carat weight, 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

Citrine forms in hydrothermal quartz veins and is commonly heat-treated from amethyst; yellow sapphire forms in igneous or metamorphic corundum-bearing rocks. Geological ages vary widely by deposit.

Uses & applications

Used primarily in jewelry and gem collecting; citrine is relatively affordable, whereas fine natural yellow sapphire can be valuable.

Geological facts

Color alone cannot distinguish these gems; refractive index, hardness, inclusions, and laboratory testing are needed. The vivid yellow color may also indicate treated quartz or another yellow gemstone.

Field identification & locations

Test cautiously: citrine scratches glass but not corundum, while sapphire is substantially harder; do not use destructive scratch tests on a valuable stone. Common sources include Brazil and Madagascar for citrine, and Sri Lanka, Madagascar, and Tanzania for yellow sapphire.