Natural Fancy Deep Grayish Blue carats, India) Donated by Harry Winston, Inc. in The Hope Diamond is renowned for its rare color and rich history. It was formed more than a billion years ago at a depth of about 150 km.
The Hope Diamond! Museum of Natural History, Washington D. The weight of the Hope diamond for many years was reported to be carats. In 1974 it was removed from its setting and found actually to weigh carats. It is classified as a type IIb diamond,