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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Arkose
Augen gneiss block
Banded iron formation
Basaltic cinder
Calcite on galena
EET 92029,0
GRO 85201,0
Halite
Halite
Hemimorphite
Johnstown
MacAlpine Hills 88105
Manganoan calcite
Microcline
Microcline (var. amazonite)
Migmatite
Miller Range 03346
Olivine-gabbro
PAT 91501,5
PAT 91501,50
Peridot gemstones
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. smoky quartz) with microcline
Rhodochrosite
Zircon (var. cyrtolite)
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