gemstone

Druzy chalcedony pendant, likely coated or dyed

Microcrystalline quartz (SiO₂), chalcedony with druzy quartz; surface may have titanium or metallic coating

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; dark blue-purple iridescent color, vitreous-to-sparkling luster, granular quartz crystals, no obvious cleavage, and specific gravity about 2.6. The uniform rainbow sheen strongly suggests an artificial coating rather than natural color.

Identified August 20, 2026More gemstone →

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At a glance

Common name: Druzy chalcedony pendant, likely coated or dyed
Scientific name: Microcrystalline quartz (SiO₂), chalcedony with druzy quartz; surface may have titanium or metallic coating
Category: gemstone
Identified: August 20, 2026
Method: Standard

AI Estimated Value

Approximately $10–$40 for a typical mounted pendant; exceptional natural druzy specimens may cost more, while coated commercial pieces are usually modestly priced.

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 deposits microcrystalline quartz, commonly in volcanic rocks; associated host material may be Cenozoic to older. The pendant has been cut, polished, drilled, mounted, and likely coated or dyed.

Uses & applications

Used primarily in inexpensive jewelry and decorative cabochons; not generally used structurally or industrially in this form.

Geological facts

Druzy is a surface covered with tiny crystals, producing glitter under light. Titanium-coated quartz and coated druzy are often marketed under trade names such as “aura druzy.”

Field identification & locations

Identify by the sparkling crystalline surface, conchoidal-looking chalcedony base, and strong artificial iridescence; natural untreated druzy usually has more limited, uneven colors. Common sources include Brazil, Uruguay, Mexico, and Madagascar.