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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Attaway Ametrine
Baryte
Bismuth
Calcite
Chabazite
Dyber Ametrine
Fluorite
Fluorite
Fluorite with calcite and chalcopyrite
Fluorites
Limestone with chert
Opal
Opal bone
Paravauxite
Phosphophyllite
Prehnite
Quartz (var. amethyst)
Quartz (var. ametrine)
Quartz Gems
Quinn Canyon
Roebling Opal
Sandstone
Southwest Sunset
Star quartz
Unusual Gems
Unusual Gems
Vivianite with pyrite
Zincite
Zincite
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