The diamond set on a ring is being auctioned in Geneva. The 12,02- carat gem, the largest of its kind, is known as the ‘Blue moon’ and is expected to sell for 55 million dollars.

The diamond set on a ring is being auctioned in Geneva. The 12,02- carat gem, the largest of its kind, is known as the ‘Blue moon’ and is expected to sell for 55 million dollars.