Lot 40. A Ceylon padparadscha sapphire and diamond ring, Oscar Heyman. Estimate US$ 60,000 - 80,000 ( € 51,000 - 69,000) . Unsold. © Bonhams 2001-2018 centering an oval-shaped modified mixed-cut padparadscha sapphire, weighing 6.43 carats, within an oval-shaped...

Lot 190. A diamond necklace, Oscar Heyman, 1968. Estimate US$ 80,000 - 100,000 (€ 69,000 - 86,000) . Sold for US$ 112,500 (€ 95,671). © Bonhams 2001-2018 designed as a graduated cluster set with marquise, pear and round brilliant-cut diamonds;with maker's...