A coloured diamond, sapphire and diamond panther brooch, by Cartier. Photo Christie's Image Ltd 2013

Designed as a pavé-set diamond panther in profile, with cabochon sapphire spots, emerald eyes, and holding a yellow kite-shaped diamond collet in its forepaws, 6.0 cm, with French assay marks for platinum and gold. Signed Cartier, no. 600688. Estimate:  $77,679 – $107,887

Christie's. MAGNIFICENT JEWELS. 15 May 2013. Geneva. www.christies.com