August 27, 1984
A 168-carat emerald, a bequest of Anna Case Mackay to the Smithsonian Institution’s National Gem Collection, is placed on permanent display in the National Museum of Natural History.
Posted: 27 August 2010
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A 168-carat emerald, a bequest of Anna Case Mackay to the Smithsonian Institution’s National Gem Collection, is placed on permanent display in the National Museum of Natural History.