The Hope Diamond is a famous blue diamond weighing 45.52 carats. It is known for its stunning deep blue color, which is caused by trace amounts of boron. The diamond has a long history, believed to have originated in India, and has changed hands many times over the centuries. Today, the Hope Diamond is housed in the Smithsonian National Museum of Natural History in Washington, D.C. It is one of the most visited gemstones in the world, attracting millions of visitors each year. The diamond is also associated with various legends and myths, including claims of a curse.