Conch Pearl Diamond and Fancy Vivid Pink Diamond Necklace. Photo courtesy Tiancheng International Auctioneer Limited

Suspending to the front a drop-shaped conch pearl measuring approximately 14.00 x 12.00 x 10.00mm, surmounted by two briolette diamonds and a pear-shaped Fancy Vivid Pink diamond, to a briolette diamond-set necklace with seven round conch pearls intervals. Centre conch pearl weighing 14.50 carats. Conch pearls together weighing 16.00 carats. Diamonds together weighing approximately 30.00 carats. Mounted in platinum and 18 karat white gold. Estimate US$220,000 - 260,000

Accompanied by AGT report numbered 5189382, stating that pink diamond is natural, of Fancy Vivid Pink colour, SI1 clarity.

Tiancheng International Auctioneer Limited. SPRING AUCTION 2013 JEWELLERY AND JADEITE. 15 Jun · 3 pm. Hong Kong Headquarters 30/F Bank of China Tower 1 Garden Road, Central Hong Kong http://www.tianchengauction.com/