The Hope Diamond is one of the most iconic items in the Smithsonian's collections, but this glittering gem is rumored to have a dark side. French monarchs, an heiress, and at least one unlucky postman have met misfortune after possessing it—though does that really constitute a curse? This time on Sidedoor, we track the lore of this notorious gem through the centuries, from southern India, through the French Revolution, and across the Atlantic Ocean to its current home at the National Museum of Natural History, to find out for ourselves.