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http://dx.doi.org/10.6111/JKCGCT.2013.23.2.81

Properties of colored topaz by new surface treatment  

Lee, Bohyun (Hanmi Gemological Laboratory (Hanmi Lab))
Koo, Changsik (Department of Gemological Engineering, Dongshin Univ.)
Yeon, Seokju (Department of Gemological Engineering, Dongshin Univ.)
Choi, Hyunmin (Hanmi Gemological Laboratory (Hanmi Lab))
Kim, Youngchool (Hanmi Gemological Laboratory (Hanmi Lab))
Kim, Sunhee (Korea Institute of Science and Technology (KIST))
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.23, no.2, 2013 , pp. 81-85 More about this Journal
Abstract
We performed analysis of composition and structure of coating layers by using ED-XRF and TOF-SIMS for some passion topaz of Swarovski which developed recently as new surface treatment of TCF (thermal color fusion) technique. In addition, we compared differences between Ti-coated topaz (Mystic topaz) and new treated colored topazes (passion topaz) with magnification observation and simplified durability test. As a result, we can observe similar characteristic clues in Ti-coated topaz and passion topaz by magnified observation. According to results of depth profile by TOF-SIMS, we can know that topaz is treated by multi-layer coating or surface diffusion coating. Moreover, the passion topaz which is treated by chemical reaction between metal elements shows more stable chemical resistance and higher Mohs' hardness than Ti-coated topaz.
Keywords
TCF topaz; Coating; Depth profile; TOF-SIMS; Durability;
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Times Cited By KSCI : 1  (Citation Analysis)
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