16 novembre 2013
A sapphire and diamond ring, by Piranesi
A sapphire and diamond ring, by Piranesi. Photo courtesy Bonhams. Set with a sugarloaf sapphire, weighing 24.60 carats, flanked to each side by shield-shaped diamonds,diamonds approximately 1.10 carats total, ring size 6½. Estimate HK$ 1 million - 1.5...