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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Merwinite
Metaconglomerate
Microcline (var. amazonite)
Midnight Dreamscape
Migmatite
Miller Range 03346
Millerite
Millerite
Millerite with hematite and quartz
Missouri River Sapphires
Montana Sapphires
Muscovite schist
Mystery Diamond
Nephrite Bowl
New Concord
Norton County
Olivine-basalt drill core
Olivine-gabbro
Opal
Opal
Opal
Opal bone
Opal replacing wood
Oregon Sunstones
Paragould
PAT 91501,5
PAT 91501,50
Pearl and Peridot Haircomb
Peekskill
Pegmatite
Peridot
Peridot
Peridot
Peridot gemstones
Peridot in Basalt
Peridotite xenolith
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