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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Actinolite
Banded iron formation
Baryte
Basalt drill core
Basalt drill core
Basalt drill core
Calcite
Columnar dacite
Fluorite
Fluorite with calcite and chalcopyrite
Fluorites
Gypsum
Lost City meteorite
Olivine-basalt drill core
Olivine-gabbro
Peridotite xenoliths in basalt
Quartz (var. agate)
Sphalerite
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