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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Mimetite
Nuevo Mercurio
Opal (var. hyalite)
Opal in matrix
Opals
Orthoclase (var. adularia) with dolomite
Paradamite with pharmacosiderite
Phosgenite
Purple agate
Pyrite with calcite
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. amethyst)
Scorodite
Sinuous Gypsum
Smithsonite
Spessartine
Spindle Bomb
Tennantite
Tlacotepec
Topaz
Unusual Gems
Wulfenite
Wulfenite
Wulfenite
Pagination
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