mineral

Yellow chalcedony or serpentine-like stone

Likely microcrystalline quartz (SiO₂), possibly yellow jasper; visual identification is uncertain

AI-generated identification · may be incorrect

Opaque yellow-green, waxy to dull luster, fine-grained and apparently shaped/polished with rough edges; chalcedony hardness is about 6.5–7 Mohs, while serpentine is softer at 2.5–5.5. No visible cleavage or crystals.

Identified September 7, 2026More mineral →

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At a glance

Common name: Yellow chalcedony or serpentine-like stone
Scientific name: Likely microcrystalline quartz (SiO₂), possibly yellow jasper; visual identification is uncertain
Category: mineral
Identified: September 7, 2026
Method: Standard

AI Estimated Value

About $2–$15 for a small common shaped piece; potentially $20–$75 if it proves to be attractive high-quality chalcedony or a known collectible 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

Yellow chalcedony/jasper forms when silica-rich groundwater fills cavities or fractures, commonly in volcanic rocks; serpentine forms by hydration of ultramafic rocks. Formation ages vary widely by locality.

Uses & applications

Used as a lapidary, carving, cabochon, or small decorative specimen; ordinary pieces have limited commercial value.

Geological facts

The yellow color may result from iron oxides or other trace elements. A scratch test, streak test, and specific-gravity measurement would distinguish chalcedony from softer look-alikes.

Field identification & locations

Likely geological material, but the image alone cannot establish species. Check whether it scratches glass (chalcedony may; serpentine usually will not), examine a white streak, and inspect translucency at the edge; common sources include Brazil, India, Madagascar, and the western United States.