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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Banded iron formation
Demantoid with serpentine
Ensisheim
Gypsum with sulphur
Juvinas
Muscovite schist
Olivine-gabbro
Orgueil meteorite
Phosgenite
Pyritic slate
Pyromorphite
Quartz (var. agate)
Quartz on siderite
Staurolite
Sulfur
Unusual Gems
Vigarano
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