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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Peridot in Basalt
Peridotite xenolith
Peridotite xenolith in basalt
Peridotite xenoliths in basalt
Phosphophyllite
Pitts
Plainview
Plantersville
Prehnite
Pyritic slate
Pyromorphite
Pyrophyllite
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. ametrine)
Quartz (var. landscape agate)
Quartz (var. smoky quartz) with microcline
Quartz Gems
Quartz Pendant
Quinn Canyon
Rhodochrosite
Rhodochrosite with quartz
Rhodonite
Rhyolite
Rhyolite pumice
Rock Creek Sapphires
Roebling Opal
Rose City
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