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HRD Discovers Hard-to-Detect Synthetic Rough Diamonds: Quick Take

Jul 13, 2015 5:30 AM   By Rapaport News
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RAPAPORT... Producers are now able to create synthetic rough diamonds in shapes identical to natural rough diamonds, HRD Antwerp reported on Friday.
  • Until now, synthetic rough diamonds could be identified by their shape, which was cubo-octahedral if produced using the high-pressure-high-temperature (HPHT) technique or a plate structure if produced using chemical vapor deposition (CVD).
  • HRD lab says synthetic rough diamonds with natural shapes, such as octahedrals, are more difficult for less experienced rough traders to discover  on the spot.
  • The goods recently examined by HRD were rough melee weighing between 0.01 carats and 0.04 carats, colorless and produced by Taidiam, a Chinese producer of HPHT and CVD-made diamonds.
  • Closer examination of the synthetic rough revealed that remnants of the seed crystal used to grow the synthetic diamond remains visible in the synthetic rough with newer shapes.
Tags: cvd, HPHT, lab-grown, Rapaport News, synthetic, synthetic rough
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