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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
Grossular (var. tsavorite)
Grossular (var. tsavorite)
Grossular Garnet
Grossular Garnets
Gypsum with sulphur
Hemimorphite
Johnstown
Manganoan calcite
Microcline (var. amazonite)
Migmatite
Phosgenite
Quartz (var. agate)
Quartz (var. smoky quartz) with microcline
Rhodochrosite
Sulfur
Unusual Gems
Vigarano
Zircon (var. cyrtolite)
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