gemstone

Yellow chalcedony or citrine-like polished stone

Chalcedony (microcrystalline quartz, SiO₂), possibly dyed or artificially illuminated; exact identification is uncertain from the image

AI-generated identification · may be incorrect

Translucent lemon-yellow body with a glassy-to-waxy luster and no visible crystal faces; quartz-group hardness is about Mohs 7, with conchoidal fracture and specific gravity near 2.60. The intense uniform color may indicate treatment or strong backlighting.

Identified September 5, 2026More gemstone →

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At a glance

Common name: Yellow chalcedony or citrine-like polished stone
Scientific name: Chalcedony (microcrystalline quartz, SiO₂), possibly dyed or artificially illuminated; exact identification is uncertain from the image
Category: gemstone
Identified: September 5, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a common polished specimen; $30–$150+ for attractive natural, well-documented material.

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 yellow chalcedony forms when silica-rich groundwater deposits microcrystalline quartz, commonly filling cavities and veins; it may form during many geological ages. Citrine, if this is crystalline quartz instead, forms through iron-related coloration in hydrothermal or igneous environments.

Uses & applications

Used as a cabochon, bead, carving, or decorative polished stone; quartz varieties are also valued for collecting and occasionally jewelry. Common treated pieces generally have modest commercial value.

Geological facts

The photograph alone cannot reliably distinguish yellow chalcedony from citrine, resin, or another translucent material; hardness and magnification tests are useful. Natural vivid yellow chalcedony is less common than gray, white, or orange varieties.

Field identification & locations

Common sources include Brazil, Uruguay, Madagascar, India, and Mexico. Check for microscopic fibrous texture, conchoidal fracture, quartz hardness, and lack of bubbles; avoid scratching valuable material, and use gemological testing for confirmation.