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http://dx.doi.org/10.6111/JKCGCT.2017.27.4.149

Recent trends of gem-quality colorless synthetic diamonds  

Choi, Hyunmin (Hanmi Gemological Institute & Laboratory (Hanmi Lab))
Kim, Youngchool (Hanmi Gemological Institute & Laboratory (Hanmi Lab))
Seok, Jeongwon (Department of Advanced Materials & Energy Engineering, Dongshin University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.27, no.4, 2017 , pp. 149-153 More about this Journal
Abstract
Recently, significant amounts of gem-quality colorless HPHT synthetic melee diamond have produced for the jewelry industry. Consequently, there have been reports of cases of fraud in the world diamond business. For example, intentionally selling synthetic diamond as natural diamond or intentionally mixing a natural diamond parcel with a synthetic. As a result, the separation of natural from synthetic melee diamonds has become increasingly critical. At present, 10,000 cubic hinge presses are used for the production of synthetic diamond in China. From among these, reportedly 1,000 presses are used for gem-quality diamond production. One press can produce up to 10ct melee-size diamonds in 24 hours. Randomly occurring pinpoint or flux-metal inclusions are diagnostic identification clues. However, some synthetic diamonds require advanced laboratory method for identification. In order to ensure consumer confidence, it is essential to screen melees so as to distinguish all synthetic goods.
Keywords
Gem-quality; HPHT; CVD; Synthetic diamond; Melee-size; Colorless;
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Times Cited By KSCI : 1  (Citation Analysis)
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