An early 19th century enamel and diamond skull stick pin. Photo courtesy Philips.

The grinning white enamel skull with rose-cut diamond eyes, on a square-section pin, length 7 cm. Estimate £1,500 - 1,800. Unsold

A pair of diamond and ruby cufflinks. Photo courtesy Philips.

Double-sided, each modelled as a skull with either brilliant-cut diamond or circular-cut ruby eyes, chain-link connection, length 4 cm. Estimate £1,000 - 2,000. SOLD FOR £1,750

Philips. JEWELS 7 JUNE 2011 LONDON -http://www.phillips.com/