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Smithsonian National Museum of Natural History
GeoGallery
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Andalusite with quartz, muscovite, and biotite
Arkose
Augen gneiss block
Baryte with berthierite
Basaltic cinder
Beryl
Beryl (var. heliodor)
Bununu
Calcite
Corundum (var. sapphire)
Cronstedtite
Elbaite
Elbaite
Elbaite
Elbaite (var. rubellite)
Fluorites
Freedom Diamond
Hemimorphite
Johnstown
Manganoan calcite
Marble with wollastonite
Mezö-Madaras
Microcline (var. amazonite)
Migmatite
Millerite
Millerite with hematite and quartz
Nautilus Tourmaline Pendant
Nigerian tourmalines
Opal
Opal
Opal replacing wood
Peekskill
Pyromorphite
Quartz (var. agate)
Quartz (var. smoky quartz) with microcline
Rhodochrosite
Pagination
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