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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Demantoid with serpentine
Gypsum with sulphur
Kyanite schist
Missouri River Sapphires
Montana Sapphires
Muscovite schist
Phosgenite
Pyritic slate
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz Gems
Rock Creek Sapphires
Sulfur
Unusual Gems
Veszelyite
Vigarano
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