East African Fancy Sapphire

  • David Federman


Twenty-two miles from the Indian Ocean, at a small bend in Tanzania’s Umba River near the Kenyan border, you’ll find a unique two-mile-radius corundum pipe that produces just about every color of sapphire imaginable. Since the pipe’s discovery in 1962, its distinctive stones have earned the name Umba sapphire.


Indian Ocean Incandescent Light Underground Shaft Asian Counterpart Small Bend 
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Copyright information

© Modern Jeweler Magazine 1990

Authors and Affiliations

  • David Federman

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