gemstone

Turquoise-and-coral silver jewelry brooch

Turquoise: hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; red cabochons appear to be coral, likely set in silver

AI-generated identification · may be incorrect

The blue-green turquoise has brown matrix and an opaque, waxy-to-subvitreous luster; hardness is about 5–6 Mohs, with a triclinic crystal structure. The red stones are opaque and organic rather than mineral crystals; the image does not allow reliable identification of the metal or exact stones.

Identified October 2, 2026More gemstone →

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At a glance

Common name: Turquoise-and-coral silver jewelry brooch
Scientific name: Turquoise: hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; red cabochons appear to be coral, likely set in silver
Category: gemstone
Identified: October 2, 2026
Method: Standard

AI Estimated Value

Approximately $30–$300 USD, depending on authenticity, stone quality, silver content, workmanship, and provenance.

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

Turquoise forms as a secondary mineral in weathered, copper-bearing rocks in arid climates, often over geologic timescales. Coral grows in marine settings and may be fossilized or modern; the stones’ specific ages and sources cannot be determined from the image.

Uses & applications

Turquoise and coral are used as ornamental gemstones in jewelry; silver provides the setting.

Geological facts

Turquoise’s brown webbing is host-rock matrix, which can be a natural identifying feature. The brooch combines geological material with a biogenic gemstone.

Field identification & locations

Look for opaque blue-green color, matrix veining, and a relatively soft surface; turquoise is commonly mined in the American Southwest, Iran, and China. The photo alone cannot establish whether the stones are treated or imitation.