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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Montana Sapphires
Nephrite Bowl
Opal
Opal
Opal
Opal bone
Opal replacing wood
Oppenheimer Diamond
Oregon Sunstones
Pearl and Peridot Haircomb
Pearson Diamond
Peridot gemstones
Peridot in Basalt
Portuguese Diamond
Prehnite
Pyromorphite
Pyrophyllite
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. landscape agate)
Quartz (var. smoky quartz) with microcline
Quartz Gems
Quartz Pendant
Rhodochrosite
Rhodochrosite
Rock Creek Sapphires
Roebling Opal
Ruby and Diamond Brooch
Pagination
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