gemstone

White cabochon gemstone, likely milky chalcedony or opalite

Chalcedony: microcrystalline quartz, SiO₂; appearance may also indicate synthetic opalite glass

AI-generated identification · may be incorrect

Translucent milky-white body with a soft blue glow and smooth domed cabochon cut, set in a gold-colored rim. Chalcedony has Mohs hardness 6.5–7, vitreous-to-waxy luster, no cleavage, and specific gravity about 2.6; the image alone cannot confirm whether it is natural.

Identified August 16, 2026More gemstone →

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At a glance

Common name: White cabochon gemstone, likely milky chalcedony or opalite
Scientific name: Chalcedony: microcrystalline quartz, SiO₂; appearance may also indicate synthetic opalite glass
Category: gemstone
Identified: August 16, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a common mounted chalcedony cabochon; $2–$15 if synthetic opalite, with higher prices possible for documented fine 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

Natural chalcedony forms when silica-rich groundwater fills cavities and fractures, commonly in volcanic rocks, over geological timescales. If opalite, it is human-made glass rather than a geological material, despite its gemstone-like appearance.

Uses & applications

Used in pendants, cabochon jewelry, carvings, and ornamental objects; chalcedony is affordable and durable for jewelry.

Geological facts

A blue flash or glow can occur from translucent chalcedony, but strong uniform internal glow is especially typical of synthetic opalite. The surrounding yellow metal appears to be a setting, not part of the specimen.

Field identification & locations

Check with a loupe for natural clouding, banding, or inclusions; test hardness only on an unimportant edge, and use refractive index or laboratory testing for reliable identification. Common chalcedony sources include Brazil, Uruguay, India, and Madagascar.