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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Almandine schist
Arkose
Augen gneiss block
Basaltic cinder
Demantoid with serpentine
Freedom Diamond
Gypsum with sulphur
Hemimorphite
Johnstown
Limestone with chert
Manganoan calcite
Microcline (var. amazonite)
Migmatite
Opal
Opal bone
Phosgenite
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. smoky quartz) with microcline
Quinn Canyon
Rhodochrosite
Roebling Opal
Sandstone
Sulfur
Unusual Gems
Vigarano
Zircon (var. cyrtolite)
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