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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Gold
Gold
Gold
Gold leaf
Gold nugget
Gold on quartz
Gypsum
Gypsum
Gypsum
Gypsum
Halite
Halite
Hemimorphite
Hemimorphite
Kyanite after andalusite
Kyanite with biotite
Lawsonite
Manganoan calcite
Marcasite
Merwinite
Microcline (var. amazonite)
Millerite
Millerite
Millerite with hematite and quartz
Mimetite
Missouri River Sapphires
Opal bone
Opal in matrix
Opal replacing wood
Orthoclase (var. adularia) with dolomite
Paradamite with pharmacosiderite
Peridot in Basalt
Prehnite
Purple agate
Pyrite with calcite
Pyromorphite
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