Files

INCOLOR SUMMER 2011

Wollo opals - A powerful source from Ethiopia.

http://gemstone.org/webincolor/Summer2011/index.html

 
WEGEL TENA, NOVEMBER 2010

We are just back from Tsehay Mewcha after our scientific expedition with the Universities of Nantes and Addis Ababa.

Article issued in the AFG magazine (French Association of Gemology) December 2010 N° 174

Purchase the magazine :
AFG 7, rue Cadet 75009 Paris
tel : +331 42 46 78 46 fax : +33 1 40 22 09 77
Lysiane Borioli gemmes7@wanadoo.fr

WOLLO OPAL , ETHIOPIA : A SOURCE OF MINING CAPACITY !

welo wollo opal ethiopia AFG cover

Authors :
Francesco Mazzero1, Christian Désagulier 2, Benjamin Rondeau3, Dereje Ayalew4, Genet Ezezew5, Thomas Cenki6, Eyassu Bekele 7

WOLLO OPAL , ETHIOPIA : A SOURCE OF MINING CAPACITY !

INTRODUCTION
Noble opal (fig.1) has been mined since March 2008 in several deposits near Wegel Tena (fig.2) in the province of Wollo (also written as Welo or Wello) in Ethiopia. A first article, describing the deposit, its mining conditions and the opals found there, was published in the Revue de l’Association Française de Gemmologie ( French Gemology Association Journal) (N° 167 – Mazzero et al
.2009). Since then, several publications have detailed the physicochemical properties of these opals (Rondeau et al., 2009, 2010a, b).Others will come out (Rondeau et al. 2011). The present article gives an account of a scientific expedition to this deposit organized and financed both by Opalinda/Eyaopal companies and Nantes University. The objectives were : providing information about the exploitation of this deposit, which seems very promising, and understanding the geological formation of opals.

Read more...
 
EXPLORING OPAL BEARING CLIFFS AT TSEHAY MEWCHA IN WOLLO, WELO, PROVINCE
church of Saint George lalibela
Wegel Tena is not far from Lalibela and the monolithic churches.
Arriving at Tsehay Mewcha ( Sun Gate) 17 km from Wegel Tena. 3200m on the Abyssinian high plateau. Not a desert at all!

tsehay mewcha wegel tena delanta

In mid April 2009, we did our first exploration, descending in the opal bearing Tsehay Mewcha cliffs, in Wollo or Welo province. There, over 100 minors in 2 cooperatives of locals allowed by the government to mine opal were working. Full info on this volcanic rock opal in the Summer 2010 issue of GEMS & GEMOLOGY

Purchase the 15 pages pdf :
http://www.gia.edu/research-resources/gems-gemology/gemsgemologycurrentissue.html
Abstract :
http://www.gia.edu/research-resources/gems-gemology/issues/summer2010-contents/summer2010-rondeau.html

 

OPALIZED FOSSILS

Fossils of plants, vegetals tubes, are found in the ignimbrite level. This opalized wood is a crystal opal with red play of colour. Might say that opal formed during a period of teasing volcanism, in pounds and forests.

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TRAGEDY STRUCK OPAL MINERS AT WEGEL TENA

May 10TH 2010

We mourn the 7 dead Ethiopian miners who lost their lives in a single accident at the Wegel Tena opal field. Small-scale Ethiopian miners sometimes don’t employ best method and equipment in the mining process. These miners carry out extensive excavations work to locate the precious stone from their respective blocks.

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DISCOVERING OPAL DEPOSITS OF SHEWA IN ETHIOPIA

By Francesco Mazzero
Issued in A.F.G. magazine n°148 October 2003
Translation by Danielle Cenki

Addis Ababa to Tarma Ber

A feeling of space, a slight exhilaration which enhances vision … an experience I already know, that of the high plateau.

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ROUGH ETHIOPIAN OPALS
blue opal nodule from Mezezo Blue crust on Mezezo brown opal nodule
Read more...

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Slowing down the light in opal.

www.aps.org/meet/CENT99/vpr/layfb14-09.html
How to slow down photons using a gemstone.

 
GEOLOGY, MINERALOGY, GEMOLOGY
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News

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BEADS

 

wollo opal beads

welo opal beads

 

Agenda

BASELWORLD 2013

Basel. April 25 to May 2.

Booth 3.1/B19

Opalinda - brand with Michael Youssoufian

Booth 3.0/A05

Opalinda - brand with Abouchar SA


 

 
HONG KONG SEPTEMBER 2013

Hong Kong Jewellery & Gem Fair September 2013

11-15, Sep 2013

ICA pavillon location Hall 8, Asia World Expo, HK

Booth N° 8G-29

 

 



 
MINERALIENTAGE 2013

MINERALIENTAGE MÜNCHEN

October 25-27

www.mineralientage.de

 

 
TUCSON SHOW 2014

 


 

 

Feb 4, thru Feb 9, 2014 GJX INTERNATIONAL PAVILLION Booth n° 3011

OPALINDA & EYAOPAL at GJX.
Eyassu Bekele  Thomas Cenki and Francesco Mazzero will display a large collection of Wollo, (Welo) cut opals.
Big and rare stones will be the hit.

 

Opal at its best!

 

 

Opals from planet Earth

Discover precious opals from Ethiopia

Opals from Mezezo have been well-known for more than 10 years for their amazingly sparkling brown and hydrophane varieties. Other deposits (re)discovered more recently yield precious opals : white, fire, crystal and sometimes black ones, all of exceptional quality. Beside reminding detractors of their unfairness, Ethiopia enters the small circle of countries producing gem opals.

 
Image of the day

FOR USE OF IMAGES OF THIS WEBSITE PLEASE CREDIT OPALINDA

Magnificent 24,32 cts wollo opal in pear shape.
wollo opal

This famous Mezezo rough has been cut in a gorgeous big gem by J.P. Gier in 2006.
mezezo opal rough

 

Interesting Wollo "rainbow"!

 

Stars in a star.

 

 

"TSEHAY MEWCHA" MEANS "SUN GATE"

No desert, no "marine" sediments, please stop saying and writing this. This opal comes from an gninbrites/rhyolites level at 2900m in the heart of the Abyssinian high plateau.

Only locals have the permit to mine near Tsehay Mewcha. At 20 km from Wegeltena village. The rough comes from numerous other places to. There are other opal deposits in Ethiopia. Future will bring more surprises. The Wollo opals are now proving that good CT opals in volcanic ground are found in Ethiopia.


Precious opal in his hand at Tsehay Mewcha.

 



 

 

 
bonus

Welo or Wollo opal
Welo opal with bright yellow-gold play of colors

Mezezo opal nodule over portugese bridge waterfall
Thin crust of blue opal on brown opal nodule.


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