Solitaire gemstone ring

This is a solitaire ring featuring a pale blue, round, faceted gemstone set in a polished metal prong setting. The shank of the ring appears to have a split-shoulder design leading up to a decorative, scalloped or crenellated bezel setting holding the central stone. The metal exhibits a silvery finish, showing minor surface wear and reflections consistent with handling. There are some indistinct marks visible on the inner band, but they are not clearly legible from the photograph alone. The visual evidence suggests a mid-century or vintage design aesthetic, though precise dating and material composition cannot be determined solely from imagery. The owner supplies the unverified attribution that the piece is an 18-karat gold ring featuring a blue zircon weighing approximately 0.5 carats. Without physical testing, gemstone grading, or assay analysis, these material and stone specifications remain unverified hypotheses. The identification rests strictly on the visible form factor of a prong-set solitaire ring with a pale blue gemstone.

Based on what I can see in the photograph, this is a solitaire ring featuring a pale blue, round, faceted gemstone set in a polished metal prong setting with a split-shoulder shank and a decorative bezel. The owner supplies the unverified attribution that the piece is an 18-karat gold ring featuring a blue zircon weighing approximately 0.5 carats. I cannot verify material composition, gold purity, or gemstone identity from a photograph alone, as visual evidence cannot distinguish between precious metals, alloys, or specific gem species like blue zircon versus synthetic spinel or glass. Therefore, this estimate assumes the owner's claim is correct for the sake of valuation. Assuming the materials are indeed 18-karat gold and a natural blue zircon, a reasonable retail replacement range for a vintage-style ring of this type is $300 to $500, reflecting typical secondary market demand for mid-century fine jewelry. If physical inspection reveals the metal is plated or of lower karat weight, or if the stone is a synthetic alternative, the value would decrease substantially, likely falling into the $50 to $150 range typical of costume or fashion jewelry. To confirm authenticity, purity, and gemstone identity, an in-person examination involving gemological testing, acid or X-ray fluorescence assay, and hallmark verification by a qualified professional would be required.