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Smithsonian National Museum of Natural History

Nifontovite

Nifontovite is a very rare borate mineral.This 0.48ct gem is the first nifontovite for the National Gem Collection.
Photo by Greg Polley. Click to zoom.
Catalog Number NMNH G10625-00
Locality Fuka Mine, Okayama, Japan
Weight 0.48 ct

Gift of Ms. Yuko Tanaka in 2009.

Nifontovite is a very rare borate mineral. It is a soft stone, only 3.5 on the Mohs scale of hardness. Nifontovite is transparent and typically colorless or gray with a vitreous luster. It was discovered in 1961 and named for the Russian geologist, Roman V. Nifontov (1901-1960). Nifontovite has been found in Russia, Mexico, and Japan. This 0.48ct gem is the first nifontovite for the National Gem Collection.


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