Lot 239. A Burmese ruby and diamond necklace, by Van Cleef & Arpels. Estimate £150,000 – £200,000 ($216,900 - $289,200). Photo Christie's Image Ltd 2016.  

Designed as a graduated collar of oval-cut ruby and brilliant-cut diamond clusters, joined by brilliant-cut diamond-set quatrefoil connections, suspending a similarly-set pear shaped drop, with concealed clasps, may also be worn as two bracelets, circa 1965, 38.0cm, London import assay marks for 18 carat gold, in Van Cleef & Arpels case. Signed Van Cleef & Arpels, with maker's marks, no.11.45 

Accompanied by report no.12545 from The Gem & Pearl Laboratory, London, stating that a sample of rubies were tested and were found to be natural, of Burmese origin, with no evidence of heat treatment 

Christie's. IMPORTANT JEWELS, 15 June 2016, London, King Street