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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
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Corundum (var. sapphire)
Elbaite
Elbaite
Elbaite
Elbaite (var. rubellite)
Estherville meteorite
Hemimorphite
Homestead
Johnstown
Kyanite schist
Manganoan calcite
Microcline
Microcline (var. amazonite)
Migmatite
Missouri River Sapphires
Montana Sapphires
Nautilus Tourmaline Pendant
Nigerian tourmalines
Opal
Opal
Opal replacing wood
Pyromorphite
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. smoky quartz) with microcline
Rhodochrosite
Rock Creek Sapphires
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