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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Fluorite with calcite
Gachala Emerald
Galena with chalcopyrite, sphalerite, and others
Galena with pyrite and marcasite
Parisite with calcite
Perovskite
Platinum nugget
Pyrite
Pyrrhotite
Russian beryls
Russian chrysoberyls
Sperrylite
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