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Smithsonian National Museum of Natural History
GeoGallery
Breadcrumb
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GeoGallery
Agate
Calcite
Calcite
Dyscrasite
Fire Opal
Gypsum
Gypsum
Hemimorphite
Mimetite
Opal (var. hyalite)
Paradamite with pharmacosiderite
Pyrite with calcite
Pyrope Hair Comb
Quartz (var. agate)
Sinuous Gypsum
Wulfenite
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