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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Lawsonite
Limestone
Limestone with chert
Logan Sapphire
Lost City meteorite
Maharani Cat's Eye
Manganoan calcite
Marble with wollastonite
Marcasite
Mern
Merwinite
Mesolite
Metaconglomerate
Microcline (var. amazonite)
Migmatite
Millerite
Millerite
Millerite with hematite and quartz
Missouri River Sapphires
Montana Sapphires
Moonstone
Moonstone Carving
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
Pagination
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