Question: George Shirley Switzer started the Smithsonian Institution's famed National Gem and Mineral Collection by acquiring what jewel weighs 45.52 carats?
Sentence (from "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.
Relevant evidence: Yes