The Unique Pink diamond
Weighing in at 15.38 carats, the Unique Pink is the largest Fancy Vivid pink pear-shaped diamond ever offered at auction. Recently cut and mounted as a ring by Cora International, the gem will go on sale as part of Sotheby's Magnificent Jewels and Noble Jewels sale in Geneva on May 17, 2016 and is expected to reach up to £26 million.
Less than 5% of all diamonds are classified as true coloured diamonds and the Unique Pink is particularly special for its Type IIa certification - the most chemically pure class of diamond - from the Gemological Institute of America. As well as owning this incredibly rare stone, the new owner will also be able to rename it thus memorialising their purchase for posterity.