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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Lost City meteorite
Mackay Emerald Necklace
Maharani Cat's Eye
Manganoan calcite
Marble with wollastonite
Marcasite
Maximilian Emerald
Merwinite
Metaconglomerate
Microcline (var. amazonite)
Migmatite
Millerite
Millerite
Millerite with hematite and quartz
Missouri River Sapphires
Mogul Emerald Necklace
Montana Sapphires
Moonstone
Moonstone Carving
Muscovite schist
Nakhla
Napoleon Diamond Necklace
Nephrite Bowl
New Concord
Norton County
Olivine-basalt drill core
Olivine-gabbro
Opal
Opal
Opal
Opal
Opal bone
Opal replacing wood
Oregon Sunstones
Paragould
Paraiba Tourmaline
Pagination
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