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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Opal replacing wood
Orbicular agate
Paraiba Tourmaline
Paravauxite
Peridot in Basalt
Prehnite
Pyromorphite
Pyrophyllite
Quartz
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. amethyst geode)
Quartz (var. amethyst geode)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. landscape agate)
Quartz (var. smoky quartz) with microcline
Quartz (var. smoky-citrine)
Rhodochrosite
Rock Creek Sapphires
Roebling Opal
Rutile
Smithsonite
Smithsonite
Sphalerite
Spodumene (var. kunzite)
Spurrite
Topaz
Topaz
Topaz with elbaite, lepidolite, and albite
Topaz with lepidolite
Veszelyite
Vivianite with pyrite
Pagination
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