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http://dx.doi.org/10.6111/JKCGCT.2015.25.5.188

Characteristics of gem-quality synthetic diamond from New Diamond Technology in Russia  

Choi, Hyunmin (Hanmi Gemological Laboratory (Hanmi Lab))
Kim, Youngchool (Hanmi Gemological Laboratory (Hanmi Lab))
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.25, no.5, 2015 , pp. 188-192 More about this Journal
Abstract
Gemological and spectroscopic properties of HPHT synthetic diamonds from New Diamond Technology (NDT) company in St. Petersburg (Russia) were examined. Their color (colorless, near-colorless with some boron and Fancy blue with high boron content) and clarity ($VVS-SI_1$) grades were comparable to those of top natural diamonds. NDT synthetic diamonds fluoresced and phosphoresced blue or orange under SWUV light. Photoluminescence spectra revealed H3 center with very small intensity and NV centers. The intensity of H3 in NDT synthetic diamond has very weak in comparison with natural one. Using a combination of gemological and spectroscopic tests, gem-quality synthetic diamonds from NDT can be distinguished from natural diamonds of similar quality.
Keywords
Gem-quality synthetic diamond; Fluorescence; Phosphorescence; H3 center; N-V center; Si-V defect; New Diamond Technology (NDT);
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Times Cited By KSCI : 3  (Citation Analysis)
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