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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Lost City meteorite
Ludlockite with smithsonite
Malachite with azurite
Malachite with cuprite, quartz, and azurite
Manganoan calcite
Marble with wollastonite
Marcasite
Merwinite
Metaconglomerate
Microcline (var. amazonite)
Migmatite
Millerite
Millerite
Millerite with hematite and quartz
Missouri River Sapphires
Montana Sapphires
Muscovite schist
Nephrite Bowl
New Concord
Norton County
Olivine-basalt drill core
Olivine-gabbro
Opal
Opal
Opal
Opal bone
Opal replacing wood
Oregon Sunstones
Orgueil meteorite
Paragould
Pearl and Peridot Haircomb
Peekskill
Pegmatite
Peridot gemstones
Peridot in Basalt
Peridotite xenolith
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