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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Arkose
Augen gneiss block
Banded iron formation
Basaltic cinder
Beryl (var. heliodor)
Calcite
Clinohumite
Corundum (var. ruby)
Fluorites
Freedom Diamond
Hemimorphite
Johnstown
Manganoan calcite
Marble with wollastonite
Microcline (var. amazonite)
Migmatite
Millerite
Millerite with hematite and quartz
Olivine-gabbro
Peekskill
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. smoky quartz) with microcline
Rhodochrosite
Spinel
Spinel
Zircon (var. cyrtolite)
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