The 35.56-carat Wittelsbach blue diamond, dating to the 17th century, was purchased by international jeweler Laurence Graff, the auction house said in a release. Graff was bidding against Aleks ...

Through his hands have passed some of the world's most fabulous and important gemstones, including the Wittelsbach-Graff diamond and the Graff Pink diamond, once owned by New York's Harry Winston, but ...