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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Arkose
Augen gneiss block
Baryte with berthierite
Basalt drill core
Basalt drill core
Basalt drill core
Basaltic cinder
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Cronstedtite
Hemimorphite
Johnstown
Kyanite schist
Manganoan calcite
Mezö-Madaras
Microcline
Microcline (var. amazonite)
Migmatite
Missouri River Sapphires
Montana Sapphires
Olivine-basalt drill core
Peridotite xenoliths in basalt
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. smoky quartz) with microcline
Rhodochrosite
Rock Creek Sapphires
Sylvanite
Veszelyite
Zircon (var. cyrtolite)
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