Recently, our reliable friends have sent us ten samples consisting of Indonesian Opal material before and after heavily treated. Normally, Opals are smoke and sugar treated to darken the body color. In this case, its quite different. This article will briefly explain the characteristic of those opal, before and after treatment, thus helping us understanding better on how to identify such treated opal. Please note that to be able to identify it, at least a standard gemological microscope is compulsory.
The aim of this treatments on these Opal is to completely change the body color from white to black and then improving its durability while at the same time its appearance by covering it with thick colorless resin.
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