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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Estherville meteorite
Fluorite with calcite
Fluorites
Homestead
Kyanite schist
Limestone with chert
Missouri River Sapphires
Montana Sapphires
Opal
Opal bone
Pyrite
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. amethyst)
Quinn Canyon
Rock Creek Sapphires
Roebling Opal
Sandstone
Sphalerite
Unusual Gems
Veszelyite
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