28 mars 2015
A sapphire and diamond ring
A 17.61 carats Burma type "royal blue" sapphire and diamond ring. Estimate US$ 200,000 - 300,000 ( €180,000 - 280,000 ). Photo: Bonhams. centering a cushion mixed-cut sapphire, weighing 17.61 carats, within a circular-cut diamond spray surround; estimated...