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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Arkose
Augen gneiss block
Baryte
Basaltic cinder
Calcite
Calcite
Dyscrasite
Elbaites
Fluorite
Fluorite with calcite and chalcopyrite
Fluorites
Freedom Diamond
Granite
Havey Tourmaline
Hemimorphite
Johnstown
Manganoan calcite
Microcline (var. amazonite)
Migmatite
Pyrope Hair Comb
Quartz (var. agate)
Quartz (var. smoky quartz) with microcline
Rhodochrosite
Staurolite schist
Zircon (var. cyrtolite)
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