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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Arkose
Augen gneiss block
Basaltic cinder
Beryl
Beryl (var. heliodor)
Bununu
Corundum (var. sapphire)
Elbaite
Elbaite
Elbaite
Elbaite (var. rubellite)
Hemimorphite
Imilac
Imilac
Johnstown
Limestone with chert
Manganoan calcite
Microcline
Microcline (var. amazonite)
Migmatite
Nautilus Tourmaline Pendant
Nigerian tourmalines
North Chile
Opal
Opal bone
Proustite cross (NMNH 12829-00)
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. smoky quartz) with microcline
Quinn Canyon
Rhodochrosite
Roebling Opal
Sandstone
Schneider Tanzanite Ring
Zagami
Zircon (var. cyrtolite)
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