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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Alexandrites
Andradite (var. demantoid)
Andradite (var. demantoid)
Basalt bomb
Carlton iron meteorite
Chrome Diopside
Fort Stockton
Galena with chalcopyrite, sphalerite, and others
Kermesite with senarmontite and dolomite
Limestone with chert
Magombedze
Opal
Opal bone
Perovskite
Plainview
Plantersville
Platinum nugget
Pyrrhotite
Quartz (var. amethyst)
Quinn Canyon
Roebling Opal
Russian beryls
Russian chrysoberyls
Sandstone
Sikhote-Alin
Sperrylite
Tiffany Amethyst Necklace
Titanite
Topaz Gems
Topaz Pendant
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