George Shirley Switzer started the Smithsonian Institution's famed National Gem and Mineral Collection by acquiring what jewel weighs 45.52 carats?
George Switzer (mineralogist): George Shirley Switzer (June 11, 1915 – March 23, 2008) was an American mineralogist who is credited with starting the Smithsonian Institution's famed National Gem and Mineral Collection by acquiring the Hope Diamond for the museum in 1958. Hope Diamond: The Hope Diamond is one of the most famous jewels in the world, with ownership records dating back almost four centuries. Hope Diamond:  Weighing 45.52 carats, its exceptional size has revealed new findings about the formation of gemstones.
The Hope Diamond