Study about the Enhancement of Colombian Emeralds 1987
Informe asesoría técnica
By dr José Ignacio Forero

Research about the Production of Shining Laps for Colombia Emeralds 1987
Helmut Bartels

Design and Co-production of Faceting Machinery for Colombian Emeralds 1988

Co-production of the “Emfill” enhancer and cleansing techniques of emeralds 1989
Gemlab Inc

Analitical Techniques to dissolve beryl and associated minerals Sep 1999
Universidad Nacional de Colombia
Iván Gómez Ramos

Study of the different abrasives and it’s behaviour 1999
Oscar Blanco, Centro Gemológico para la Investigación de la Esmeralda
Gemtec ltda
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