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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Banded iron formation
Baryte
Baryte with calcite
EET 92029,0
GRO 85201,0
Limestone with chert
MacAlpine Hills 88105
Miller Range 03346
Olivine-gabbro
Opal
Opal bone
PAT 91501,5
PAT 91501,50
Peridot gemstones
Quartz (var. agate)
Quartz (var. amethyst)
Quinn Canyon
Roebling Opal
Sandstone
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