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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Peridotite xenolith in basalt
Peridotite xenoliths in basalt
Pyromorphite
Quartz (var. amethyst)
Quartz (var. landscape agate)
Smithsonite
Smithsonites
Tiffany Opal Necklace
Unusual Gems
Unusual Gems
Unusual Gems
Vanadinite with romanechite
Wulfenite
Wulfenite
Wulfenite
Yowah Opal Nut
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