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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. ametrine)
Quartz (var. landscape agate)
Quartz (var. smoky quartz) with microcline
Quartz Gems
Quartz on siderite
Quartz Pendant
Quartz with Fluorite
Quinn Canyon
Rhodochrosite
Rhyolite
Rhyolite pumice
Rock Creek Sapphires
Roebling Opal
Rose City
Sandstone
Sandstone
Smithsonite
Smithsonite
Smithsonite
Smithsonites
Southern Charm Pearl Earrings
Southwest Sunset
Spessartine
Spessartine
Sphalerite
Spodumene (var. kunzite)
Spurrite
Stalagmite
Star quartz
Staunton
Staurolite
Staurolite schist
Success meteorite
Sunstones
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