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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Arkose
Augen gneiss block
Basaltic cinder
Cafarsite
Calcite
Elbaites
Fluorite with quartz
Fluorites
Freedom Diamond
Granite
Havey Tourmaline
Hemimorphite
Johnstown
Kyanite schist
Magnetite
Manganoan calcite
Marble with wollastonite
Microcline (var. amazonite)
Migmatite
Milarite with chlorite
Millerite
Millerite with hematite and quartz
Orthoclase (var. adularia)
Peekskill
Quartz (var. agate)
Quartz (var. smoky quartz)
Quartz (var. smoky quartz) with microcline
Quartz Gems
Rhodochrosite
Siderite
Staurolite schist
Zircon (var. cyrtolite)
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