Diamonds across time

Not so long ago, the global library of professional publications on precious stones was replenished with a unique book about rare diamonds and diamond jewelry published by the World Diamond Museum. Alex Popov, the founder and director of the museum told...

18 january 2021

Academician Pokhilenko: The situation with rough diamonds in the Russian Federation will start changing for the worse as early as 2025

Nikolai Petrovich Pokhilenko, Academician of the Russian Academy of Sciences (RAS), Deputy Chairman of the Siberian Branch (SB) of the RAS, Scientific Director of the Institute of Geology and Mineralogy of the SB of the RAS, is a prominent...

11 january 2021

Ilgiz Fazulzyanov: For a creator, the quarantine is the time to work on future masterpieces

Ilgiz Fazulzyanov is a successful and internationally recognized jewellery designer. He received his academic art education in Kazan and moved to Moscow in the 1990s where he lives and works now. His brand, Ilgiz F., is well known among true connoisseurs...

04 january 2021

Botswana Diamonds keen to mine KX36 kimberlite if found commercial

Botswana Diamonds intends to mine the KX36 kimberlite, which it recently acquired from Petra Diamonds if found commercial. The high-grade KX36 kimberlite pipe is part of the three Prospecting Licenses in the Central Kalahari Game Reserve in Botswana...

28 december 2020

‘We expect to completely open the Bourse for business by Q1 of the Year 2022,’ assures Vallabhbhai Patel, Chairman, SDB

Vallabhbhai Patel, Chairman of the Surat Diamond Bourse, dreamed of building the world’s largest commercial building in Surat for the Indian diamond industry. He conceptualized the ‘Surat Diamond Bourse’ (SDB), which is set to redefine...

21 december 2020

GSI identified HTHP lab-grown diamond with “laser drill channel”

27 february 2020

Gemological Science International’s (GSI) Mumbai laboratory identified a HTHP lab-grown diamond with what appeared to be laser drilled channel.  

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                                                 Image credit: GSI


Upon closer examination, the “laser drill channel” was found to be a typical HTHP inclusion that was cut open from top and pavilion. After this, the content of the inclusion was acid bleached out, while some residue was still present. 
The remnants of the inclusion have a strong resemblance to a laser drill treatment – this treatment is generally used to “clean out” black inclusions and enhance the appearance of a diamond.
It is a common misconception that a diamond can be identified as natural or lab-grown based on inclusions as the claim was made recently on Good Morning America Investigates. In this specific case, a hasty and inaccurate conclusion could have been made that the diamond is natural, with the appearance of what seems to be a laser drill channel, since there are no recorded cases of lab-grown diamonds with this treatment, GSI reported.

Alex Shishlo, Editor of the Rough&Polished European Bureau