Cullinan Diamond
The Cullinan Diamond is the largest gem-quality rough diamond ever found, weighing , discovered at the Premier No. 2 mine in Cullinan, South Africa, on 26 January 1905. It was named after Thomas Cullinan, the mine's chairman.
National Museum of Natural History
The National Gem and Mineral Collection is one of the most significant collections of its kind in the world. The collection includes some of the most famous pieces of gems and minerals including the Hope Diamond and the Star of Asia Sapphire, one of the largest sapphires in the world. There are currently over 15,000 individual gems in the collection, as well as 350,000 minerals and 300,000 samples of rock and ore specimens. Additionally, the Smithsonian's National Gem and Mineral Collection houses approximately 35,000 meteorites, which is considered to be one of the most comprehensive collections of its kind in the world.