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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Opal
Opal
Opal
Opal
Opal
Opal
Opal (var. hyalite)
Opal in matrix
Opal Peacock Brooch
Opal vertebra
Opals
Orthoclase (var. adularia) with dolomite
Paradamite with pharmacosiderite
Paravauxite
Phosphophyllite
Platinum nugget
Purple agate
Pyrite with calcite
Pyromorphite
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. ametrine)
Quartz Gems
Russian chrysoberyls
Scorodite
Sinuous Gypsum
Southwest Sunset
Spindle Bomb
Tiffany Opal Necklace
Tlacotepec
Topaz
Unusual Gems
Vivianite with pyrite
Wulfenite
Wulfenite
Pagination
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