Sotheby's is auctioning a D/IF Diamond on November 20th in Geneva.
On the 27th of October they will be auctioning some Magnificent Jewels and Jadeite for example this chain necklace, set with a pear-shaped diamond weighing 56.03 carats, to the pavé-set diamond surmount, completed by a link-chain necklace, mounted in platinum, surmount detachable, photographed unmounted. The largest DIF pear-shaped diamonds over 25 carats sold at auction:
