An 18th century Indian emerald and diamond sarpech, Deccan, late 18th-early 19th Century. Photo Christie's Image Ltd 2012

The articulate turban ornament designed as five hinged openwork floral panels set with foiled table-cut diamonds, suspending five emerald bead drops, surmounted by a similarly-set tapering scroll aigrette suspending a single emerald bead drop, the red enamelled reverse with green and blue enamel detail, 21.2 cm. Estimate: SFr.350,000-550,000 (US$370,000-580,000)

Notes: Cf. Usha R Bala Krishnan, Jewels of the Nizams, Indian Book House Pvt Ltd, Mumbai, 2001, pp. 92 and 97 for sarpech of similar design.

Christie's. Geneva Magnificent Jewels. 13 November 2012, Geneva