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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Attaway Ametrine
Baryte with berthierite
Bismuth
Cafarsite
Cronstedtite
Dyber Ametrine
Fire Opal
Fluorite with quartz
Fluorites
Kyanite schist
Magnetite
Mezö-Madaras
Milarite with chlorite
Opal (var. hyalite)
Orthoclase (var. adularia)
Paravauxite
Phosphophyllite
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. ametrine)
Quartz (var. smoky quartz)
Quartz Gems
Siderite
Southwest Sunset
Sylvanite
Vivianite with pyrite
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