gemstone

Green chalcedony (possibly chrysoprase) cabochon

Chalcedony, microcrystalline quartz (SiO₂); chrysoprase is nickel-colored chalcedony

AI-generated identification · may be incorrect

Polished, opaque-to-translucent blue-green bead with a waxy to vitreous luster; quartz crystal structure, Mohs hardness 6.5–7, no visible cleavage. The image alone cannot confirm whether the color is natural or treated.

Identified October 3, 2026More gemstone →

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At a glance

Common name: Green chalcedony (possibly chrysoprase) cabochon
Scientific name: Chalcedony, microcrystalline quartz (SiO₂); chrysoprase is nickel-colored chalcedony
Category: gemstone
Identified: October 3, 2026
Method: Standard

AI Estimated Value

About $10–$100 for a small chalcedony bead ring; fine natural chrysoprase jewelry may be worth more depending on quality and setting.

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 as silica deposited in cavities and fractures, often in volcanic rocks; chrysoprase’s green color comes from nickel-bearing compounds. Deposits occur in rocks of various ages, including younger weathering zones.

Uses & applications

Used for beads, cabochons, and other jewelry; chalcedony also serves as a decorative carving stone.

Geological facts

Chalcedony is a fine-grained aggregate of quartz and moganite; chrysoprase is a prized green variety, historically used in ornamental objects.

Field identification & locations

A spherical, polished bead set in gold-colored metal is consistent with chalcedony jewelry, but color and appearance cannot distinguish natural chrysoprase from dyed chalcedony or other materials. Not classifiable as igneous, sedimentary, or metamorphic from the image.