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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)
Fluorites
Kyanite schist
Marble with wollastonite
Millerite
Millerite with hematite and quartz
Missouri River Sapphires
Monazite
Montana Sapphires
Muscovite schist
Olivine-basalt drill core
Peekskill
Peridot gemstones
Peridotite xenoliths in basalt
Pyritic slate
Quartz (var. agate)
Quartz (var. agate)
Rock Creek Sapphires
Veszelyite
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