The rough melee goods examined by HRD Antwerp varied in size from 0.01 ct to 0.04 ct and were produced by Taidiam, a Chinese company offering both HPHT and CVD lab grown diamonds. “A more in-depth investigation on a microscopic level however still reveals the remnants of a seed crystal used to position the precipitated carbon atoms, and / or other characteristics inherent to lab grown diamonds. An infrared spectroscopy analyses by our research team has also demonstrated that all colourless diamonds included in the examination were found to be type IIa or type IIb” explains Dr Katrien De Corte, Chief Education Officer HRD Antwerp.
“The fact that lab grown diamonds now also occur in an octahedral shape merely affects the rough trade as once the diamonds are polished, dedicated equipment still provides a full proof solution for identifying lab grown diamonds in our lab” Mrs De Corte added.
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