London Blue Topaz and Diamond Yellow Gold Bangle

This item is a slender hinged bangle bracelet crafted in yellow gold, likely 10k or 14k based on its vibrant yellow hue and common contemporary jewelry standards. The central decorative element features a bezel-set oval-faceted gemstone, which exhibits a deep teal-blue color characteristic of London Blue Topaz. Flanking this central stone are two small, round brilliant-cut diamonds, each set within a split-shank or bypass-style architectural mounting that tapers into the main body of the bangle. The metalwork includes minor decorative ridges or collets on either side of the focal point, transitioning into a smooth, thin circular band. The bangle features a integrated hinge and a traditional tongue-and-groove clasp, possibly including a safety catch on the side. The surface appears to be in good pre-owned condition with light surface scratches and minor tarnish consistent with occasional wear. The style is classic and minimalist, suggesting a late 20th-century to early 21st-century manufacturing date. The craftsmanship shows clean casting and secure setting indicative of commercial fine jewelry quality. No immediate stamps or signatures are visible in the image, but such pieces are typically hallmarked on the interior shank near the hinge or clasp.

I have conducted a visual inspection of this bypass-style bangle. The piece features a central oval-cut London Blue Topaz, estimated at 1.00-1.25 carats, flanked by two round brilliant diamonds. The craftsmanship reflects a high-quality commercial production consistent with late 20th-century jewelry. The setting appears secure, and the metal exhibits a luster characteristic of 14k yellow gold, though some surface abrasions and light oxidation are present, consistent with moderate wear. Market demand for London Blue Topaz remains steady as an accessible luxury gemstone, though the piece is not considered rare. Valuation is based on current fair market resale prices for similar fine jewelry secondary market listings. My assessment assumes the stones are natural; however, visual analysis alone cannot definitively confirm the absence of synthetic substitutes or specific heat treatments common to topaz. Furthermore, without a physical scale and acid or XRF testing, the gold karatage and total gram weight are estimates based on visual density and typical manufacturing standards. A full authentication would require in-person gravity testing for metal purity, microscopic examination of the diamonds to determine color/clarity grades, and a refractometer test for the central stone. Provenance documentation or original retail receipts would also assist in tightening this valuation range.