Hope Diamond ($250 million). Among the most romanticized jewels in the world, the Hope Diamond is housed at the Smithsonian's National Museum of Natural History and considered the second-most visited piece of art in the world (behind the "Mona Lisa"). Discovered in India in 1812, the 45.52-carat blue-gray stone has had many owners over the years. .
The Hope Diamond! Museum of Natural History, Washington D.C. The weight of the Hope diamond for many years was reported to be 44.5 carats. In 1974 it was removed from its setting and found actually to weigh 45.52 carats. Saw this at the Smithsonian....amazing!