Excelsior Diamond
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The Excelsior Diamond is a gem-quality diamond, and was the largest known diamond in the world from the time of its discovery in 1893 until 1905, when the Cullinan Diamond was found. It was found on J
Depiction of the Excelsior in Precious Stones and Gems (1898) by Edwin W. Streeter
Photo depicting "...the exact size." in Mark Twain's 1897 travelogue, "Following the Equator"