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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Agate
Azurite
Beryl (var. emerald)
Calcite
Demantoid with serpentine
Gypsum
Gypsum
Gypsum
Gypsum with sulphur
Hemimorphite
Mimetite
Opal in matrix
Orthoclase (var. adularia) with dolomite
Paradamite with pharmacosiderite
Phosgenite
Purple agate
Pyrite with calcite
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. amethyst)
Scorodite
Sinuous Gypsum
Sulfur
Wulfenite
Wulfenite
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