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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. landscape agate)
Quartz (var. smoky quartz) with microcline
Quartz Gems
Quartz Pendant
Quinn Canyon
Rhodochrosite
Rhodochrosite with quartz
Rhodonite
Rhyolite
Rhyolite pumice
Rock Creek Sapphires
Roebling Opal
Rose City
Sandstone
Sandstone
Scapolite
Scapolite
Scorodite
Sinuous Gypsum
Smithsonite
Smithsonite
Smithsonites
Southern Charm Pearl Earrings
Sphalerite
Spindle Bomb
Spinel
Spinel
Spinel ring
Spodumene (var. kunzite)
Spurrite
Stalagmite
Star quartz
Pagination
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