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Smithsonian National Museum of Natural History
GeoGallery
Breadcrumb
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GeoGallery
Adamite
Attaway Ametrine
Bismuth
Dyber Ametrine
Limestone with chert
Nakhla
New Concord
Opal
Opal bone
Paravauxite
Peridot gemstones
Phosphophyllite
Quartz (var. amethyst)
Quartz (var. ametrine)
Quartz Gems
Quinn Canyon
Rhodochrosite with arsenopyrite
Roebling Opal
Sandstone
Southwest Sunset
Vivianite with pyrite
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