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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Calcite
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Demantoid with serpentine
Fluorites
Gypsum with sulphur
Harriman
Kyanite schist
Marble with wollastonite
Millerite
Millerite with hematite and quartz
Missouri River Sapphires
Montana Sapphires
Peekskill
Phosgenite
Quartz (var. agate)
Quartz (var. agate)
Rock Creek Sapphires
Sulfur
Unusual Gems
Veszelyite
Vigarano
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