mineral

Polished yellow chalcedony (likely quartz pebble)

Chalcedony, microcrystalline quartz (SiO₂), possibly iron-stained jasper

AI-generated identification · may be incorrect

Mohs hardness 6.5–7; pale yellow to honey-colored, waxy-to-glassy luster, translucent edges, and no visible cleavage. The rounded shape and surface reflect polishing or natural water abrasion; internal cloudy bands and dark inclusions are consistent with chalcedony or jasper.

Identified August 13, 2026More mineral →

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At a glance

Common name: Polished yellow chalcedony (likely quartz pebble)
Scientific name: Chalcedony, microcrystalline quartz (SiO₂), possibly iron-stained jasper
Category: mineral
Identified: August 13, 2026
Method: Standard

AI Estimated Value

Typically $2–$15 for a small common polished pebble; approximately $20–$100+ if unusually translucent, patterned, or confirmed from a desirable locality.

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

Forms when silica-rich groundwater fills cavities and fractures, precipitating microscopic quartz fibers; yellow coloration commonly comes from iron oxides. The specimen’s exact geological age and locality cannot be determined from the image.

Uses & applications

Used as ornamental stone, carvings, cabochons, beads, and small polished collectibles; chalcedony is also valued in jewelry when strongly colored or patterned.

Geological facts

Chalcedony is a quartz variety composed of extremely fine interlocking crystals, giving it a smooth waxy appearance rather than obvious crystal faces.

Field identification & locations

Field clues include hardness sufficient to scratch ordinary glass, lack of cleavage, waxy luster, and conchoidal fracture; common sources include Brazil, Uruguay, India, Madagascar, and the western United States.