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Weighing 30.82 carats, the Blue Heart diamond was cut in 1910 and made the rounds of the major jewelry houses for the next half century. Cartier got it first, setting it in a corsage sold to an Argentinian collector. Van Cleef & Arpels then turned it into a pendant in 1953, but Harry Winston landed it six years later and it became the ring you see now.
The Blue HeartDiamond. It is the world's second largest and finest dark-blue diamond and weighs 30.62 carats, about two-thirds the size of the Hope Diamond. It was found in the Premiere Mine in South Africa in November 1908. Merriweather Post acquired the original from Harry Winston before donating it to the Smithsonian.