Umba sapphire

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.

ee also

*Umba River (Tanzania)
*Umba Valley
*Sapphire

References

* [http://www.neweragems.com/product_list_sub.asp?subcatid=33 Newragems listing]
* [http://www.ajol.info/viewarticle.php?id=16567&jid=98&layout=abstract African Journals Online listing]
* [http://minerals.usgs.gov/minerals/pubs/country/2002/tzmyb02.pdf USGS: The Mineral Industry of Tanzania]


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  • Umba — may refer to *Umba, Russia, an urban type settlement in Murmansk Oblast, Russia *Umba River (Russia), a river on the Kola Peninsula, Russia *Umba River (Tanzania), a river in Tanzania *Umba Valley, a valley in Tanzania *Umba sapphire, a sapphire… …   Wikipedia

  • Umba Valley — is a geographic area in Tanzania and the world s only source of Umba sapphires. The Umba River flows through the Umba Valley.Specifically, Umba Valley is located in the Lelatema Mountains in the Arusha Region of Tanzania.References*… …   Wikipedia

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