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Play-of-colour opal from Wegel Tena, Wollo Province, Ethiopia

Benjamin Rondeau, et al.

A new opal deposit was discovered in 2008 near the village of Wegel Tena, in the volcanic rocks of Ethiopia’s Wollo Province.

Abstract Header from the 2009 issue of Gems & Gemology

Abstracts; Summer 2009

Brendan M. Laurs, Thomas W. Overton

This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

Green Opal From East Africa

John I. Koivula and C. W. Fryer, December 1, 1984

Gemmological and chemical analysis of bright green gem-quality opal from Tanzania.

Opal from the Shewa Province, Ethiopia

Mary L. Johnson, Robert C. Kammerling, June 1, 1996

Opal occurs as nodules in volcanic rocks at a new gem opal locality in the Menz Gishe district of Shewa Province, Ethiopia.

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