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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Opal
Opal bone
Pyrope
Pyrope (var. rhodolite)
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. smoky quartz) with microcline
Quinn Canyon
Rhodochrosite
Roebling Opal
Rosser Reeves Star Ruby
Sandstone
Spinel
Spinels
Star of Bombay
Star of Katandru
Star Sapphire Necklace
Unusual Gems
Zagami
Zircon (var. cyrtolite)
Zircons
Pagination
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