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Wednesday, February 28, 2007

Joban Oil

Nearly all emeralds are treated with a liquid or resin after cutting. In India, Joban oil (green) is the choice for treating commercial grade emeralds. The treaters believe the oil improves the overall gemstonality of the emeralds. All treatments should be disclosed at all levels of the distribution chain. If you are doubtful have it checked by a reputed gem testing laboratory.

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