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 ...

The 35.56-carat Wittelsbach blue diamond, dating to the 17th century, was purchased by international jeweler Laurence Graff ... Christie's reported jewelry sales of $226 million for the first ...

Graff makes another appearance on the list with this gorgeous, large yellow diamond ring. It last sold for $16.8 million in 2014. The diamond weighs a staggering 100.09 carats, which is extremely ...