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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Opal (var. hyalite)
Opal in matrix
Opals
Orthoclase (var. adularia) with dolomite
Paradamite with pharmacosiderite
Paraiba Tourmaline
Paraiba Tourmaline
Paraiba Tourmaline
Paraiba Tourmaline Ring
Peridot gemstones
Post Diamond Tiara
Purple agate
Pyrite with calcite
Pyroxmangite
Quartz
Quartz
Quartz (var. agate)
Quartz (var. amethyst geode)
Quartz (var. amethyst geode)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. ametrine)
Quartz (var. citrine)
Quartz (var. rose)
Quartz (var. smoky-citrine)
Quartz (var. smoky-citrine)
Quartz Gems
Quartz Gems (var. citrine)
Quartz with Chamosite
Quartz with Clinochlore
Quartz with sphalerite inclusions
Rhodonite
Rock Crystal Quartz Egg
Rose quartz sphere
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