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