スミソニアン博物館のインスタグラム(smithsonian) - 12月14日 08時22分

Seeing red? The DeYoung Red Diamond is one of the largest known natural red diamonds, weighing a little over 5 carats.
In the late 1930s or early 1940s, the diamond was acquired by jeweler S. Sydney DeYoung, mounted in an estate scarf pin set with a dark brownish-red stone that everyone assumed was a garnet. DeYoung realized the red stone was really a diamond (!) and removed it to be kept in a vault.
He decided to bequeath the diamond to the Smithsonian, and it officially joined the National Gem Collection of @smithsoniannmnh in 1987.

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