AN IMPRESSIVE AQUAMARINE AND DIAMOND COCKTAIL RING, MOUNTED BY CARTIER, CIRCA 1965 The central cut-cornered rectangular aquamarine weighing approximately 22.00cts within claw-setting, to an undulating brilliant and baguette-cut diamond frame, mounted in platinum, diamonds approximately 1.30cts total, signed Monture Cartier, with maker's mark for 'Cartier Société Anonyme', with maker's case, French assay mark, ring size I½