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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Agate
Attaway Ametrine
Bismuth
Calcite
Diaspore
Diaspore
Dyber Ametrine
Fluorites
Gypsum
Gypsum
Hemimorphite
Mimetite
Paravauxite
Phosphophyllite
Pyrite with calcite
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. ametrine)
Quartz Gems
Sinuous Gypsum
Southwest Sunset
Vivianite with pyrite
Wulfenite
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