gemstone

Green chalcedony (likely chrysoprase or dyed chalcedony)

Microcrystalline quartz, SiO₂; chrysoprase is nickel-bearing chalcedony

AI-generated identification · may be incorrect

Mohs hardness 6.5–7; translucent apple-green body, waxy to vitreous luster, cryptocrystalline structure, no visible cleavage, and conchoidal fracture. The oval cabochon is polished and may contain natural or treatment-related speckling.

Identified September 15, 2026More gemstone →

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At a glance

Common name: Green chalcedony (likely chrysoprase or dyed chalcedony)
Scientific name: Microcrystalline quartz, SiO₂; chrysoprase is nickel-bearing chalcedony
Category: gemstone
Identified: September 15, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a common treated cabochon; $30–$200+ for fine natural chrysoprase, depending on color, translucency, size, and origin.

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 when silica-rich groundwater fills cavities and fractures, commonly in volcanic rocks; chrysoprase obtains its green color from nickel. Formation ages vary widely, while vivid commercial material commonly comes from Australia, Poland, Brazil, and Tanzania.

Uses & applications

Used for cabochons, beads, carvings, and ornamental objects; attractive saturated chrysoprase can be valuable, while dyed green chalcedony is inexpensive.

Geological facts

Chrysoprase is the best-known natural green chalcedony and was prized in ancient jewelry. Color can fade with prolonged heat or strong sunlight.

Field identification & locations

Identify it by its uniform green color, translucency, hardness, and waxy polish; quartz will scratch glass, but definitive separation from dyed chalcedony requires testing or laboratory analysis. The image alone cannot confirm natural chrysoprase versus dyed material.