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Smithsonian National Museum of Natural History


Photograph of cassiterite (NMNH C5698) from the National Mineral Collection
Photo by Chip Clark. Click to zoom.
Catalog Number NMNH C5698-00
Locality Minas Gerais, Brazil

From the exhibit

Cassiterite is a major source of tin. Although exceptional crystals such as these are sometimes found in pegmatites, they are not abundant enough in these deposits to make mining profitable.



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