National Museum of Natural History
The Mackay Emerald
September 1, 1984 – January 30, 1995
A 168-carat egg-shaped, flat emerald—believed to be the largest fine emerald ever to go on public exhibition—has been donated to NMNH. The emerald is a bequest of the late Anna Case Mackay, a former Metropolitan Opera soprano. The gem, which came from Colombia, is set in an art deco platinum pendant, attached to a pave-set diamond link chain.
