Sterling Silver Marcasite Ring with Oval Green Gemstone

The item is a sterling silver ring featuring a central oval-cut, cabochon-style green gemstone, likely a type of chalcedony such as chrysoprase or green agate, set prominently within a decorative bezel. The ring's head is large and oval-shaped, characterized by intricate filigree work and pave-set marcasite stones. The design incorporates swirling floral or foliate motifs, resembling stylized leaves and small trefoils, creating an openwork pattern around the central gem. The marcasites, small faceted pyrite stones, are set closely together, providing a glittering, somewhat antique appearance. The metal appears to be silver, though its exact purity (e.g., 925 sterling) is not discernible without a hallmark. The finish of the silver has a darkened or oxidized patina in the recessed areas, which accentuates the detail of the filigree and enhances the contrast with the sparkling marcasites. The ring shank appears solid and relatively plain, leading up to the ornate head. The overall style suggests an Art Deco or Edwardian revival influence, commonly seen in vintage or reproduction jewelry. The condition appears good, with no obvious missing marcasites or significant damage to the central stone. The dark areas indicate intentional oxidation for aesthetic purposes rather than tarnish, suggesting good craftsmanship. No visible maker's marks or signatures are apparent in the provided image. The large size and elaborate design point to a statement piece, possibly designed for the index or middle finger.