A retro diamond cocktail ring, by Van Cleef & Arpels. Photo Christie's Image Ltd 2014.

entering upon a brilliant-cut diamond within two rows of diamonds to the fluted wirework hoop, 1950s, ring size 6, with French assay marks for platinum and gold. Signed Van Cleef & Arpels, no. 4.290cs . Estimate CHF18,000 – CHF27,000 ($20,530 - $30,795)

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