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.
Read MoreThis article focuses on Colombian emeralds and gives a detailed explanation of the oiling process as observed by the author.
Read MoreCriteria for distinguishing emerald filling substances were investigated.
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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.
Read MoreOne of the greatest concerns with emerald filling is the degree of clarity enhancement such treatment represents
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