A large ruby and emerald-set ring, India, 19th century. Photo Christie's Image Ltd 2014

The ring rising to openwork leaf motifs supporting a large floral bloom inset with foiled emeralds and rubies, decorated with hanging diamond trefoils at either side, one lacking; 1.3/8in. (3.5cm.) across. Estimate £3,000 – £4,000

Christie's. ART OF THE ISLAMIC AND INDIAN WORLDS INCLUDING A PRIVATE COLLECTION DONATED TO BENEFIT THE UNIVERSITY OF OXFORD, PART V. 10 April 2014, London, King Street - www.christies.com