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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
African Gems
Albite (var. moonstone)
Amazonite
Apophyllite with prehnite
Arkose
Augen gneiss block
Banded iron formation
Basaltic cinder
Dolerite
Elbaite
Elbaite
Freedom Diamond
Grossular (var. tsavorite)
Grossular (var. tsavorite) and Elbaite
Hemimorphite
Johnstown
Kyanite after andalusite
Manganoan calcite
Microcline (var. amazonite)
Migmatite
Olivine-gabbro
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. smoky quartz) with microcline
Rhodochrosite
Stalagmite
Staunton
Zircon (var. cyrtolite)
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