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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Adamite
Baryte
Calcite
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Fluorite
Fluorite with calcite and chalcopyrite
Fluorites
Kyanite schist
Missouri River Sapphires
Montana Sapphires
Muscovite schist
Pyritic slate
Quartz (var. agate)
Quartz (var. agate)
Rhodochrosite with arsenopyrite
Rock Creek Sapphires
Veszelyite
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