WHITE GOLD, CHALCEDONY, SAPPHIRE, AMETHYST AND DIAMOND 'FLOWERHEAD' BROOCH, DESIGNED BY SUZANNE BELPERRON, 1932-1955 Centered by a cabochon sapphire framed by amethyst surrounds, with six articulated chalcedony petals spaced by six cabochon amethysts set on articulated gold sprays, each accented by old mine-cut diamonds weighing approximately 1.45 carats,