mineral

Tumbled greenish chalcedony or serpentine pebble

Likely microcrystalline quartz (chalcedony, SiO₂) or serpentine-group mineral; exact identification requires testing

AI-generated identification · may be incorrect

Smooth, rounded, opaque-to-translucent pale olive-green body with dull/waxy luster; likely Mohs 2.5–7 depending on material, with no visible cleavage. The uniformly tumbled shape indicates human polishing.

Identified August 14, 2026More mineral →

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At a glance

Common name: Tumbled greenish chalcedony or serpentine pebble
Scientific name: Likely microcrystalline quartz (chalcedony, SiO₂) or serpentine-group mineral; exact identification requires testing
Category: mineral
Identified: August 14, 2026
Method: Standard

AI Estimated Value

Typically $2–$15 as a small tumbled stone; exceptional authenticated jade or rare material could be worth substantially more.

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

Chalcedony forms from silica-rich fluids filling cavities and fractures, commonly in volcanic rocks; serpentine forms by alteration of ultramafic rocks. Formation ages vary widely by locality.

Uses & applications

Used as a low-cost decorative stone, worry stone, paperweight, or cabochon; valuable only if unusually attractive, durable, or from a desirable locality.

Geological facts

The image alone cannot reliably distinguish pale green chalcedony from serpentine, jade-like materials, or dyed stone. A scratch test, streak, specific gravity, and refractive index would help.

Field identification & locations

Check translucency and hardness: quartz-based material resists a steel knife and scratches glass, whereas serpentine is softer and may be scratched by steel. Common sources include Brazil, India, Madagascar, the United States, and New Zealand.