Inscribed with the name Nur Jahan, the wife of the Mughal Emperor Shah Jahangir, this heart-shaped diamond is believed to have been a gift from the ruler to his son, who became the great emperor Shah Jahan (1592-1666).

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Last year the American Heart Association declined a gift from Michael Gold and Lee Siler, cofounders of Stockdr.com, an Altamonte Springs, Fla.

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