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Umba sapphire

Umba sapphire is a unique type of fancy sapphire discovered circa 1960 in the Gerevi Hills, north of the Umba River in the Umba Valley of Tanzania. Umba sapphires exhibit coloration not common to sapphires sourced from other parts of the world.

As of November 2006, the Tanzanian government prohibits export of these sapphires.

See also

  • Umba River (Tanzania)
  • Umba Valley
  • Sapphire


  • Newragems listing
  • African Journals Online listing
  • USGS: The Mineral Industry of Tanzania

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Umba_sapphire". A list of authors is available in Wikipedia.
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