mineral

Yellow chalcedony (likely common yellow jasper or waxy quartz)

Microcrystalline quartz, SiO₂; likely chalcedony with iron-oxide or other coloring impurities

AI-generated identification · may be incorrect

Translucent honey-yellow to mustard material with a waxy luster and irregular conchoidal-looking fracture; apparent hardness about Mohs 6.5–7, no cleavage, trigonal quartz structure, and specific gravity near 2.6. The rounded surface appears naturally weathered or roughly polished.

Identified September 7, 2026More mineral →

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At a glance

Common name: Yellow chalcedony (likely common yellow jasper or waxy quartz)
Scientific name: Microcrystalline quartz, SiO₂; likely chalcedony with iron-oxide or other coloring impurities
Category: mineral
Identified: September 7, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a common rough specimen of this size; approximately $20–$100 if unusually translucent, attractive, and professionally polished.

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, depositing microcrystalline quartz; yellow color commonly comes from iron compounds. Chalcedony occurs in volcanic rocks and sedimentary environments, generally ranging from Paleozoic to modern deposits.

Uses & applications

Used for carvings, cabochons, beads, lapidary pieces, and decorative stone; tougher varieties can be tumbled or polished. Common material usually has modest commercial value.

Geological facts

The image cannot reliably distinguish yellow chalcedony from yellow jasper, silicified material, or low-grade honey-colored quartz. A streak, hardness, translucency, and specific-gravity test would improve identification.

Field identification & locations

Commonly found in volcanic cavities and gravel deposits worldwide, including Brazil, Uruguay, India, Madagascar, and the western United States. It should scratch ordinary glass but not be scratched by a steel nail; avoid testing valuable surfaces.