News Flash

Manufacturers are now able to create synthetic rough diamonds in shapes identical to natural rough diamonds disclosed by HRD Antwerp

Previously telling natural rough diamonds from lab grown rough diamonds was fairly straightforward due to the typical cubo-octahedral shape seen with diamonds produced by HPHT (High Pressure High Temperature) and the characteristic plate structure of diamonds produced by CVD (Chemical Vapour Deposition) which significantly differs from the morphology of natural diamonds. However some caution is required as recently HRD Antwerp came across (near-) colourless lab grown diamonds featuring octahedral and other “natural” shapes. The fact that rough lab grown diamonds featuring a morphology previously unique to natural diamonds are now entering the market, makes it more difficult for less experienced rough traders to make a visual on the spot identification of lab grown rough diamonds. 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.

Said HRD

10/12/18
ESSAIS DE REPRODUCTION ARTIFICIELLE DU DIAMANT | FR

Après que les chimistes eurent découvert que le diamant n'était que du charbon cristallisé, on…

15/10/18
HPHT in kleine octaëders | NL

Sinds enkele jaren worden wij geconfronteerd met synthetische diamanten, hetzij HPHT (hoge druk en hoge…

05/10/18
COMPOSITION CHIMIQUE DU DIAMANT | FR

Les anciens alchimistes croyaient que la pierre philosophale était faite de la matière la plus…

18/07/18
Anvers a réalisé une révolution dans le processus de polissage des diamants | FR

Le Centre scientifique et de recherche technologique pour les diamants (WTOCD), de l’AWDC, l'organisation centralisant…

20/06/18
Spectroscopy Raman and Gemmology | EN

The Raman effect was discovered in 1928 by an Indian doctor of the same name…

20/06/18
RUWE DIAMANT IMITATIE | NL

In een artikel in het tijdschrift van AFG heeft dr. Emmanuel Frtisch (hoogleraar aan de…

22/05/18
ALEXENDRITE | FR

Peu connue du grand publique, c’est une pierre précieuse qui est rarement exposée, elle reste…

16/04/18
LA TANZANITE | FR

Sa couleur d’un bleu saphir « Birman » avec un soupçon de violet en fait…

26/03/18
HET VERSTELLEN: EEN VERDWENEN BEROEP | NL

Sinds de uitvinding van Lodewijk Van Berquem in 1476 tot begin van de XXI eeuw…