"The Beau Sancy, a 34.98-carat stone with 400 years of European history via four royal families, sold for $9.7 million after a pre-sale high estimate of $4 million, purchased by an anonymous bidder."

WOW! the Beau Sancy is one of the most important royal diamonds ever to attend an auction.

http://www.nationaljeweler.com/nj/fashion/a/~28509-Storied-stone-doubles-estimate-at