HOPE DIAMOND

It is blue to the naked eye because of trace amounts of boron within its crystal structure, and exhibits red phosphorescence after exposure to ultraviolet light. It is classified as a Type IIb diamond, and is notorious for supposedly being cursed. It has a long recorded history, with few gaps, in which it changed hands numerous times on its way from India to France to Britain and to the United States. It has been described as the "most famous diamond in the world"