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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Opal
Opal
Opal
Opal
Oregon Sunstones
Paraiba Tourmaline
Paraiba Tourmaline
Paraiba Tourmaline Ring
Pearl and Peridot Haircomb
Pegmatite
Peridot gemstones
Peridotite xenolith
Peridotite xenolith in basalt
Peridotite xenoliths in basalt
Post Diamond Tiara
Pyritic slate
Pyroxmangite
Quartz
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. ametrine)
Quartz (var. citrine)
Quartz (var. dendritic agate)
Quartz (var. rose)
Quartz (var. smoky-citrine)
Quartz Gems
Quartz Gems (var. citrine)
Quartz Pendant
Quartz with Chamosite
Quartz with Clinochlore
Quartz with sphalerite inclusions
Rhodonite
Rhyolite
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