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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Gypsum
Gypsum
Gypsum
Hemimorphite
Hemimorphite
Hologem Fire Opal Pendant
Hooker Emerald
Mackay Emerald Necklace
Maximilian Emerald
Mimetite
Mogul Emerald Necklace
Nautilus Tourmaline Pendant
Nigerian tourmalines
Nuevo Mercurio
Opal (var. hyalite)
Opal in matrix
Opals
Orthoclase (var. adularia) with dolomite
Paradamite with pharmacosiderite
Parisite with calcite
Peridot
Peridot
Peridot
Peridot gemstones
Perovskite
Platinum nugget
Post Emerald Necklace
Purple agate
Pyrite with calcite
Pyrrhotite
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. amethyst)
Russian beryls
Russian chrysoberyls
Scorodite
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