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Smithsonian National Museum of Natural History

Corundum (var. sapphire)

Photograph of four Yogo sapphires from Montana
Photo by Chip Clark. Click to zoom.
SpecimenCatalog NumberLocalityWeight
Corundum (var. sapphire)NMNH G7707-00Montana, United States10.2 ct
Corundum (var. sapphire)NMNH G3631-00Montana, United States6.15 ct

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