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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Malachite with azurite
Malachite with cuprite, quartz, and azurite
Mimetite
Muscovite schist
Nautilus Tourmaline Pendant
Nigerian tourmalines
Nuevo Mercurio
Opal (var. hyalite)
Opal in matrix
Opals
Orthoclase (var. adularia) with dolomite
Paradamite with pharmacosiderite
Phosgenite
Prehnite
Purple agate
Pyrite with calcite
Pyritic slate
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. amethyst)
Scorodite
Sinuous Gypsum
Smithsonite
Spessartine
Spindle Bomb
Tennantite
Tlacotepec
Topaz
Unusual Gems
Unusual Gems
Unusual Gems
Wulfenite
Wulfenite
Wulfenite
Zagami
Zincite
Pagination
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