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Smithsonian Gem & Mineral Collection
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| In 1811, Napoleon I gave this 275-carat diamond necklace to Empress Marie Louise to celebrate the birth of their son, the future king of Rome. From the gem and mineral collection of the Smithsonian's National Museum of Natural History. |
| Last modified 2026-08-09 MZ |
Smithsonian photos by Dane A. Penland Copyright 1992 Smithsonian Institution |
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