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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Albite (var. moonstone)
Amazonite
Apophyllite with prehnite
Banded iron formation
Baryte with berthierite
Bismuthinite
Calcite in betekhtinite
Creedite with pyrite
Cronstedtite
Dolerite
Kyanite after andalusite
Mezö-Madaras
Olivine-gabbro
Quartz (var. agate)
Stalagmite
Staunton
Sylvanite
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