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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
Beryl (var. emerald)
Calcite
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Ethiopian Opals
Fluorites
Georgina Emerald
Kyanite schist
Marble with wollastonite
Millerite
Millerite with hematite and quartz
Missouri River Sapphires
Montana Sapphires
Muscovite schist
Olivine-basalt drill core
Opal
Opal
Opal
Opal
Opal
Peekskill
Peridotite xenoliths in basalt
Pyritic slate
Quartz (var. agate)
Quartz (var. agate)
Rock Creek Sapphires
Veszelyite
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