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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Attaway Ametrine
Basalt drill core
Basalt drill core
Basalt drill core
Bismuth
Demantoid with serpentine
Dyber Ametrine
Gypsum with sulphur
Mern
Olivine-basalt drill core
Paravauxite
Peridotite xenoliths in basalt
Phosgenite
Phosphophyllite
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. ametrine)
Quartz Gems
Southwest Sunset
Sulfur
Unusual Gems
Vigarano
Vivianite with pyrite
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