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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Lawsonite
Limestone
Limestone with chert
Lost City meteorite
Magnetite
Manganoan calcite
Marble with wollastonite
Marcasite
Merwinite
Metaconglomerate
Microcline (var. amazonite)
Migmatite
Milarite with chlorite
Millerite
Millerite
Millerite with hematite and quartz
Missouri River Sapphires
Montana Sapphires
Mount Padbury
Mundrabilla
Murchison
Murchison meteorite
Muscovite schist
Nautilus Tourmaline Pendant
Nephrite Bowl
New Concord
Nigerian tourmalines
Norton County
Olivine-basalt drill core
Olivine-gabbro
Opal
Opal
Opal
Opal
Opal
Opal
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