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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Arkose
Attaway Ametrine
Augen gneiss block
Basaltic cinder
Bismuth
Chabazite
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Dyber Ametrine
Hemimorphite
Johnstown
Kyanite schist
Manganoan calcite
Microcline
Microcline (var. amazonite)
Migmatite
Missouri River Sapphires
Montana Sapphires
Paravauxite
Phosphophyllite
Pitts
Prehnite
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. ametrine)
Quartz (var. smoky quartz) with microcline
Quartz Gems
Rhodochrosite
Rock Creek Sapphires
Southwest Sunset
Unusual Gems
Unusual Gems
Veszelyite
Vivianite with pyrite
Zincite
Pagination
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