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University Diploma of Gemology

U.F.R Sciences and Technologies

Nantes University

Mr. Yannick MANDABA


Ethiopian Opals

Public presentation, 10th juin 2003

at the Geological Department

before the committee as followed :

 

M. B. LASNIER
 Professor, Président
M. E. FRITSCH
 Professor, Vice-président
M. J. GIRARDEAU
 Professor
M. J-P. GAUTHIER
 Professor
M. Ph. MAITRALLET

French Gemological Laboratory
(Chamber of commerce, Paris)
M. F. NOTARI
 GEMTECHLAB (Geneva, Switzerland)
M. F. MAZZERO
 Guest
OPALINDA Company

 

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