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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Bismuthinite
Calcite
Calcite in betekhtinite
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Creedite with pyrite
Kyanite schist
Millerite
Missouri River Sapphires
Montana Sapphires
Quartz (var. agate)
Quartz (var. agate)
Rock Creek Sapphires
Smithsonite
Smithsonites
Veszelyite
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