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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Monazite
Montana Sapphires
Moonstone
Moonstone
Moonstone
Moonstone
Moonstone Carving
Mount Padbury
Mundrabilla
Murchison
Murchison meteorite
Muscovite schist
Mystery Diamond
Nakhla
Napoleon Diamond Necklace
Nautilus Tourmaline Pendant
Nephrite
Nephrite Bowl
Nephrite Bowl
Nephrite Bowl
Nephrite Perfume Bottle
New Concord
Nifontovite
Nigerian tourmalines
North Chile
Norton County
Nuevo Mercurio
Olivine-basalt drill core
Olivine-gabbro
Opal
Opal
Opal
Opal
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