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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Arkose
Augen gneiss block
Baryte
Basaltic cinder
Calcite
Carlton iron meteorite
Fluorite
Fluorite
Fluorites
Fort Stockton
Hematite
Hemimorphite
Johnstown
Manganoan calcite
Microcline
Microcline (var. amazonite)
Migmatite
Plainview
Plantersville
Quartz (var. agate)
Quartz (var. smoky quartz) with microcline
Rhodochrosite
Rose City
Topaz Gems
Topaz Pendant
Zircon (var. cyrtolite)
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