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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Opal
Opal
Opal Peacock Brooch
Opal vertebra
Orbicular agate
Orthoclase
Peridotite xenoliths in basalt
Perovskite
Platinum nugget
Pyromorphite
Pyrrhotite
Quartz
Quartz (var. amethyst)
Quartz with Fluorite
Russian beryls
Russian chrysoberyls
Sikhote-Alin
Sperrylite
Spessartine
Tiffany Amethyst Necklace
Tiffany Opal Necklace
Titanite
Titanite
Topaz Gems
Unusual Gems
Unusual Gems
Yowah Opal Nut
Zircon
Pagination
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