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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Peridot gemstones
Petalite
Phosgenite
Poudretteite
Pyromorphite
Scapolite
Scheelite
Smithsonite
Spessartine
Spinel Bracelet
Spinels
Star of Asia
Tennantite
Tetrahedrite
Unusual Gems
Wulfenite
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