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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Amphibole-rock
Banded iron formation
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Fluorite
Garnetiferous schist
Granite block
Kyanite schist
Lafayette
Lafayette
Marcasite
Missouri River Sapphires
Montana Sapphires
Olivine-gabbro
Pearl and Peridot Haircomb
Pegmatite
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Rock Creek Sapphires
Veszelyite
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