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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Basalt drill core
Basalt drill core
Basalt drill core
Calcite
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Fluorite
Fluorites
Kyanite schist
Marble with wollastonite
Millerite
Millerite with hematite and quartz
Missouri River Sapphires
Montana Sapphires
Muscovite schist
Nifontovite
Olivine-basalt drill core
Peekskill
Pentahydroborite
Peridotite xenoliths in basalt
Pyritic slate
Quartz (var. agate)
Quartz (var. agate)
Rock Creek Sapphires
Stibnite
Topaz Gems
Veszelyite
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