American Museum of Natural History
Allison and Roberto Mignone Halls of Gems and Minerals

The Allison and Roberto Mignone Halls of Gems and Minerals (formerly the Harry Frank Guggenheim Hall of Gems and Minerals) is on the first floor, north of the Ross Hall of Meteorites. It houses thousands of rare gems, minerals specimens and pieces of jewelry. The halls closed in 2017 to undergo a $32 million redesign by Ralph Appelbaum Associates and reopened to the general public in June 2021. The redesigned exhibits adopt newer philosophies in exhibit design, including a focus on storytelling, interactivity, and connecting ideas across disciplines. The halls explore a range of topics, including the diversification of mineral species over the course of Earth's history, plate tectonics, and the stories of specific gems.

The halls display rare samples chosen from among the more than 100,000 pieces in the museum's collection including the Star of India, the Patricia Emerald, and the DeLong Star Ruby.
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