15.48ct Opal and Diamond Platinum Cocktail Ring

This is a significant cocktail ring featuring a large, oval-shaped cabochon opal with a reported weight of 15.48 carats. The opal serves as the central focal point, displaying a vibrant milky-white body color with a strong 'play-of-color' that includes flashes of neon green, yellow, and orange. The stone is secured by a six-prong setting in a high-polish white metal, identified by the listing as platinum. The shank is accented on the shoulders with small, round brilliant-cut diamonds grain-set into a leaf-shaped or scrolled decorative motif. One of the secondary images shows a '900' or 'PT900' hallmark on the interior of the band, confirming the platinum purity. The ring's construction is robust, designed to support the substantial size of the gemstone. Based on the scale shown next to a ruler and on a mannequin hand, the opal is approximately 20-25mm in length. The condition appears to be excellent with no visible crazing or cracks to the opal's surface, though the white metal shows typical light surface micro-scratches consistent with gentle wear. The style is a classic late 20th-century or contemporary estate design, emphasizing the natural beauty of the oversized gemstone through a minimalist but elegant mount.