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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Sperrylite
Spinel
Spinel peridotite
Spinels
Star of Bombay
Star of Katandru
Star Sapphire Necklace
Thompson Diamonds
Tiffany Amethyst Necklace
Topaz Gems
Unusual Gems
Winston Adamantine Pearl
Zircons
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