Characteristics of Colored Topaz through a New Surface Treatment

To find out the characteristics, color’s genesis and identifying features of TCF (Thermal Color Fusion) topaz, and the differences between TCF topaz and the past coating topaz products, this article takes TCF topaz, which appeared recently in the market, and two other common generation of coatings topaz sample as the object of study, and use a variety of gemology testing instruments and wide spectrum and narrow spectrum of X-ray photoelectron spectroscopy to analyze the gemology feature, surface structure and composition of the sample, the results shows that: the difference of the surface layer composition is the basic reason for the color difference of these samples, but the film structure and thickness of the sample do not have a big impact to the color. This article has also carried on the examination to the sample durability, at the same time analyzing and comparing a variety of optimized topaz production process. The TCF topaz technology has the advantages of both two kinds of process of coating and the diffusion, TCF topaz is rich in color compared to diffusion and irradiation product, it is better than irradiation product on high temperature resistance and radioactive residues.