A sapphire and diamond ring, by Cartier. Photo Christie's Image Ltd 2014 Set with an oval cabochon sapphire, within a circular-cut diamond surround, to the circular-cut diamond shoulders, mounted in gold. Signed Cartier, no. 87929. Estimate $20,000 –...

A rare blue and white 'Lotus Scroll' 'Mantouxin' bowl, Mark and period of Yongzheng. Photo: Sotheby's elegantly potted with rounded sides rising from a recessed base, the exterior finely decorated with a lotus scroll issuing leafy tendrils and eight lotus...

A sapphire and diamond ring, by Bvlgari. Photo Christie's Image Ltd 2014 Set with a cushion-cut sapphire, weighing approximately 27.42 carats, to the circular-cut diamond gallery and bifurcated shoulders, enhanced with baguette-cut and shield-shaped diamonds,...