Controversial Jewelry Collection of Nazi Sympathizer Up for Auction at Christie's.

Christie's will auction a jewelry collection valued at $150 million, once owned by Helmut Horten, who made a fortune buying businesses from Jews who were forced to sell in Nazi Germany. The collection has more than 700 pieces and includes the "Briolette of India" necklace, which has a 90-carat diamond with an estimated value of $7.8 million. Despite the painful history, Christie's decided to host the items, and the Helmut Horten Foundation is now a key driver of philanthropic causes. The collection's estimated value surpasses that of Elizabeth Taylor's jewelry collection, which sold for $137 million in 2011.