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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Amphibole-rock
Arkose
Augen gneiss block
Basaltic cinder
Carlton iron meteorite
Fort Stockton
Garnetiferous schist
Granite block
Hemimorphite
Hubnerite with quartz
Johnstown
Manganoan calcite
Microcline
Microcline (var. amazonite)
Migmatite
Opal
Pegmatite
Plainview
Plantersville
Quartz (var. agate)
Quartz (var. smoky quartz) with microcline
Rhodochrosite
Rhodochrosite with quartz
Rhodonite
Tetrahedrite
Topaz Gems
Topaz Pendant
Zircon (var. cyrtolite)
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