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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Adamite
Amphibole-rock
Basalt drill core
Basalt drill core
Basalt drill core
Ensisheim
Garnetiferous schist
Granite block
Juvinas
Limestone with chert
Olivine-basalt drill core
Opal
Opal bone
Orgueil meteorite
Pegmatite
Peridotite xenoliths in basalt
Pyromorphite
Quartz (var. amethyst)
Quartz on siderite
Quinn Canyon
Rhodochrosite with arsenopyrite
Roebling Opal
Sandstone
Staurolite
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