The Biron Hydrothermal Synthetic Emerald
A new synthetic emerald exhibits some characteristics that are distinctly different from other synthetic emeralds, such as gold inclusions.
The Coscuez Mine: A Major Source of Colombian Emeralds
The Coscuez mine, one of a number in Colombia, is rapidly gaining significance as a major source of fine emeralds.
Classifying Emerald Clarity Enhancement at the GIA Gem Trade Laboratory
One of the greatest concerns with emerald filling is the degree of clarity enhancement such treatment represents