An emerald, coloured sapphire and ruby 'serpent' bracelet, by de Grisogono. Photo Christie's Image Ltd 2014

Designed as a hinged coiled snake, the body entirely set with circular-cut emeralds in honeycomb patterns, the eyes as two ruby cabochons, the head crowned with a fancy-cut yellow sapphire, weighing approximately 144.12 carats, mounted in gold, diameter 5.5 cm, in black leather fitted de Grisogono case. By de Grisogono, no. N39949. Estimate CHF70,000 – CHF100,000 ($79,758 - $113,939)

Christie's. GENEVA MAGNIFICENT JEWELS. 14 May 2014, Geneva -http://www.christies.com/