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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Apatite
Calcite
Cordierite (var. iolite)
Fluorite
Fluorite
Fluorite
Fluorite
Gold
Kyanite
Petalite
Scapolite
Tiffany Opal Necklace
Whitney Alexandrite
Whitney Flame Topaz
Yowah Opal Nut
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