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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Logan Sapphire
Maharani Cat's Eye
Moonstone
Moonstone Carving
Nautilus Tourmaline Pendant
Nigerian tourmalines
Peridot gemstones
Peridot in Basalt
Peridotite xenolith
Peridotite xenolith in basalt
Pyrope
Pyrope (var. rhodolite)
Quartz (var. amethyst)
Quartz (var. landscape agate)
Rosser Reeves Star Ruby
Sandstone
Smithsonite
Smithsonites
Spinel
Spinels
Star of Bombay
Star of Katandru
Star Sapphire Necklace
Tugtupite
Unusual Gems
Unusual Gems
Wulfenite
Wulfenite
Wulfenite
Zagami
Zircons
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