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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Agate
Attaway Ametrine
Azurite
Baryte with berthierite
Bismuth
Calcite
Cronstedtite
Dyber Ametrine
Gypsum
Gypsum
Hemimorphite
Mezö-Madaras
Mimetite
Paravauxite
Phosphophyllite
Pyrite with calcite
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. ametrine)
Quartz Gems
Sinuous Gypsum
Southwest Sunset
Sylvanite
Vivianite with pyrite
Wulfenite
Wulfenite
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