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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Amphibole-rock
Arkose
Augen gneiss block
Baryte
Basaltic cinder
Calcite
Fluorite
Fluorite
Fluorites
Freedom Diamond
Garnetiferous schist
Granite block
Hematite
Hemimorphite
Johnstown
Kermesite with senarmontite and dolomite
Magombedze
Manganoan calcite
Microcline (var. amazonite)
Migmatite
Pegmatite
Quartz (var. agate)
Quartz (var. smoky quartz) with microcline
Rhodochrosite
Titanite
Zircon (var. cyrtolite)
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