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Smithsonian National Museum of Natural History
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Johnstown
Manganoan calcite
Microcline (var. amazonite)
Migmatite
Mimetite
Nautilus Tourmaline Pendant
Nigerian tourmalines
Nuevo Mercurio
Opal (var. hyalite)
Opal in matrix
Opals
Orthoclase (var. adularia) with dolomite
Paradamite with pharmacosiderite
Purple agate
Pyrite with calcite
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. smoky quartz) with microcline
Rhodochrosite
Scorodite
Sinuous Gypsum
Spindle Bomb
Tlacotepec
Topaz
Wulfenite
Wulfenite
Zagami
Zircon (var. cyrtolite)
Pagination
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