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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Nigerian tourmalines
Nuevo Mercurio
Opal (var. hyalite)
Opal in matrix
Opals
Orthoclase (var. adularia) with dolomite
Paradamite with pharmacosiderite
Peridot
Peridot
Peridot
Peridot gemstones
Prehnite
Purple agate
Pyrite with calcite
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. amethyst)
Scorodite
Sinuous Gypsum
Spindle Bomb
Titanite with calcite and adularia
Tlacotepec
Topaz
Triplite
Unusual Gems
Unusual Gems
Väyrynenite
Wulfenite
Wulfenite
Zagami
Zincite
Zincite
Pagination
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