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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Banded iron formation
Calcite
Chabazite
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Dyscrasite
Kyanite schist
Missouri River Sapphires
Montana Sapphires
Olivine-gabbro
Prehnite
Pyrope Hair Comb
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Rock Creek Sapphires
Unusual Gems
Unusual Gems
Veszelyite
Zincite
Zincite
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