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Smithsonian National Museum of Natural History

Unusual Gems

Photograph of a group of rare and unusual gems (NMNH G1898, G8834, G8923, G8039, G9721, G3387, and G3782) from the National Gem Collection
Photo by Chip Clark. Click to zoom.
SpecimenCatalog NumberLocalityWeight
RhodoniteNMNH G8039-00New South Wales, Australia4.85 ct
TitaniteNMNH G9721-00Madagascar14.35 ct
KornerupineNMNH G3782-00Madagascar7.6 ct
EuclaseNMNH G8834-00Minas Gerais, Brazil18.29 ct
PrehniteNMNH G8923-00Australia8.51 ct
BenitoiteNMNH G3387-00California, United States7.7 ct
WillemiteNMNH G1898-00New Jersey, United States11.8 ct

Center, a deep red rhodonite gem (4.9ct) from Australia. Clockwise from top: a pale blue-green euclase gem (18.3ct) from Brazil; a yellow titanite gem (14.4ct) from Madagascar; a green, kite-shaped kornerupine gem (7.6ct) from Madagascar; one of the largest known brilliant blue benitoite gems (7.66ct) from San Benito County, California, the sole source for specimens so deeply colored; a delicate yellow prehnite gem (8.5ct) from Australia; and a golden colored willemite gem (11.7ct) from Franklin, New Jersey.


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