gemstone

Opal ring (likely precious opal)

Hydrated amorphous silica, SiO₂·nH₂O; the pictured stone may be natural opal or a lab-created/imitation opal

AI-generated identification · may be incorrect

Oval cabochon with blue-green body color and multicolored play-of-color, set in a metal ring. Opal has no crystal structure, Mohs hardness about 5.5–6.5, vitreous to waxy luster, and no cleavage; the image alone cannot confirm whether this is solid opal or a doublet/triplet.

Identified October 3, 2026More gemstone →

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At a glance

Common name: Opal ring (likely precious opal)
Scientific name: Hydrated amorphous silica, SiO₂·nH₂O; the pictured stone may be natural opal or a lab-created/imitation opal
Category: gemstone
Identified: October 3, 2026
Method: Standard

AI Estimated Value

Approximately $20–$500 for a mounted ring, with exceptional natural opal potentially worth more; value depends strongly on authenticity, color pattern, weight, and metal.

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 opal forms as silica-rich water deposits gel in rock cavities and cracks, then hardens over time; its age and locality cannot be determined from the photo. Precious opal is notably mined in Australia, Ethiopia, and Mexico.

Uses & applications

Used primarily in jewelry and collecting; opal is too soft and sensitive to drying or impact for many demanding industrial uses.

Geological facts

Its shifting colors arise from light diffraction by ordered silica spheres. Some commercial opals are assembled or synthetic, so appearance alone is not proof of natural origin.

Field identification & locations

Look for changing color patches as the stone moves and inspect the side for layered construction or a dark backing. A gemologist can identify natural solid opal versus a composite or imitation.