A wide array of coloured gemstone jewellery will go under the hammer at Bonhams’ Rare Jewels & Jadeite auction scheduled for November 30 at Admiralty in Hong Kong. Top-billing the sale is a rare sapphire and diamond ring by Mouawad, which has a pre-sale estimate of HK$6.8 million to HK$8.8 million (US$880,000 to US$1.1 million). … Read More →