Vintage 9.10ct Sugarloaf Sapphire and Diamond Bombé Ring

A vintage sapphire and diamond bombé ring, set with an unheated sugar-loaf cabochon sapphire, weighing 9.10ct, in the centre, with pavé set round brilliant-cut diamonds and channel set baguette-cut diamonds in the surround, with an estimated total diamond weight of 8.50ct, mounted in platinum. Accompanied by GRS certificate GRS2007-061977, stating that the sapphire weighs 9.10ct and shows no indication of thermal treatment and measures 12.10 x 10.00 x 7.23mm, circa 1960.