gemstone

Opal and emerald-like gemstone jewelry

Likely common precious opal (hydrated amorphous silica, SiO₂·nH₂O) paired with green beryl or quartz; metal setting obscures definitive identification

AI-generated identification · may be incorrect

The left stone shows blue-green play-of-color typical of opal; the right is translucent green with a glassy luster and likely faceted/polished. Opal hardness is about 5.5–6.5 Mohs; beryl is 7.5–8, while quartz is 7.

Identified August 26, 2026More gemstone →

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At a glance

Common name: Opal and emerald-like gemstone jewelry
Scientific name: Likely common precious opal (hydrated amorphous silica, SiO₂·nH₂O) paired with green beryl or quartz; metal setting obscures definitive identification
Category: gemstone
Identified: August 26, 2026
Method: Standard

AI Estimated Value

Approximately $10–$100 for costume or treated pieces; $100–$1,000+ if the opal and green stone are natural, attractive, and gemologically verified.

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

Opal forms when silica-rich groundwater deposits gel in cavities and fractures, commonly in Cenozoic volcanic or sedimentary settings; green beryl forms in granitic pegmatites. The pictured stones are cut and mounted in jewelry.

Uses & applications

Used primarily in jewelry and collecting; value depends on color, transparency, treatments, size, and confirmed identity.

Geological facts

Play-of-color results from diffraction by regularly spaced silica spheres, not ordinary iridescence. Green stones sold as “emerald” require laboratory testing for natural emerald, treatments, and origin.

Field identification & locations

Confirm with refractive index, specific gravity, microscopy, and spectroscopy; avoid scratch tests on the finished jewelry. Common opal sources include Australia, Ethiopia, and Mexico; emerald sources include Colombia, Zambia, and Brazil.