The Hope Diamond

The Hope Diamond is a large, 45.52 carats (9.10 g), fancy deep blue diamond, currently housed in the Smithsonian Natural History Museum in Washington, D.C. The Hope Diamond is blue to the naked eye because of trace amounts of boron within its crystal structure, but it exhibits red phosphorescence under ultraviolet light. It is classified as a Type IIb diamond, and is famous for supposedly being cursed.

It turned out that he had in his possession an intriguing steel blue stone which at first look seemed to be a large sapphire, but the well-experienced Tavernier soon realized it was a diamond – the largest deep blue diamond in the world