Antique Yellow Glass Cabochon Edwardian Brooch / Pin

This item appears to be a vintage or antique Edwardian style brooch featuring a large, oval, chartreuse or yellow-green cabochon stone set within an ornate filigree metal frame. The stone is likely glass, resin, or a semi-precious agate, and the metal is likely a base metal (like brass) or a silver/gold-tone costume jewelry metal, designed in a Victorian or Art Deco revival style.  Key Details: Style: The brooch exhibits classic design elements of vintage costume jewelry, specifically Victorian Revival style due to the intricate filigree metalwork. Stone: The large, smooth, oval (marquise shape) stone appears to be a cabochon cut of glass, lucite, or possibly Iona marble, which is a unique green stone from Scotland. It has a polished, slightly waxy or satin finish. Metal: The metal frame has an antiqued or silver-tone finish and features detailed openwork (filigree) and decorative beading around the central stone. Gently worn but in great preloved vintage condition. Happy Poshing 🎁 Potential Era: Similar designs were popular in the Edwardian era (early 1900s) and during Victorian Revival periods in the mid-20th century.