o Gem-set, cultured pearl and diamond necklace and a pair of ear clips, 'Jaipur', Mauboussin. photo Sotheby"s. Comprising: a necklace set with cultured pearls of black tint enhanced with cabochon and fluted carved sapphires, buff-top amethyst, pink tourmaline...

An amethyst, diamond and cultured pearl brooch. photo courtesy Bonhams The large cushion-shaped amethyst within a 19th century openwork frame of old brilliant and rose-cut diamonds, suspending a detachable cultured pearl drop with rose-cut diamond cap,...