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
On the Identification of Various Emerald Filling Substances
Criteria for distinguishing emerald filling substances were investigated.
Fracture Filling of Emeralds Opticon and Traditional "Oils"
The filling of surface-reaching breaks in emeralds is a relatively common practice, for which various kinds of oils and a natural resin have historically been used.
Emeralds of the Panjshir Valley, Afghanistan
With the withdrawal of Soviet troops from Afghanistan, villagers in the Panjshir Valley are turning their attention to the emerald riches of the nearby Hindu Kush Mountains.
The oil treatment of emeralds in Bogotá, Colombia
This article focuses on Colombian emeralds and gives a detailed explanation of the oiling process as observed by the author.