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GSI to Flag Treatments in Lab-Grown Reports
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Gemological Science International (GSI) has launched a new grading report for synthetic diamonds that states whether a stone has been through post-growth treatment, claiming to be the first major laboratory to offer this.The LGX Complete...
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Rough Markets
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Mar 15, 2020
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Rapaport News
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Lab Spots New Method for Masking Synthetics
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Gemological Science International (GSI) is urging extra diligence after receiving a lab-grown diamond bearing a treatment generally only found in natural stones.“Diamond-growing technology continues to improve and growers are trying to mimic natural diamonds in every possible...
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Polished Markets
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Feb 25, 2020
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Rapaport News
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GIA Suspends Sealing Service
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The Gemological Institute of America (GIA) has halted its diamond-sealing service after fraudsters tampered with packets and replaced stones with treated ones. A small number of packages were “compromised” after leaving the GIA...
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Polished Markets
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Jan 19, 2020
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Rapaport News
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Undisclosed Green Synthetics Raise GIA Eyebrows
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Twenty-five undisclosed lab-grown diamonds have turned up atthe Gemological Institute of America (GIA) — including several with a raregreenish color. The GIA’s lab in Carlsbad, California, recently received thestones — weighing from 0.46 to 0.52 carats — for...
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Technology
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May 26, 2019
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Rapaport News
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India Credit Slowdown Squeezes Sarine Profit
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Sarine Technologies posted a loss in the first quarter ascredit problems in the Indian manufacturing sector led to softened demand forits equipment. The diamond-technology company reported a net loss of $1.4million, versus a profit of $3.1 million for...
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Polished Markets
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May 20, 2019
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Rapaport News
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GIA Aligns Lab-Grown Reports with FTC Standards
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The Gemological Institute of America (GIA) has updated thelanguage in its lab-grown-diamond certificates to conform to the recent Federal Trade Commission (FTC) guidelines.The grading lab will no longer use the term synthetic whenreferring to diamonds created...
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Polished Markets
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Mar 31, 2019
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Rapaport News
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CIBJO Calls for Synthetics Treatment Disclosure
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The World Jewellery Confederation (CIBJO) has specified theneed to disclose treatments when it comes to both natural and lab-grown diamonds. Sellers must make the disclosure clearly, both at the time of sale and before, the...
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Polished Markets
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Mar 17, 2019
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Rapaport News
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GIA Spots CVD Stone in Parcel of Treated Melee
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In a rare case, the Gemological Institute of America (GIA)has discovered an irradiated chemical vapor deposition (CVD) diamond in a batch of natural melee aclient had submitted for testing. The GIA’s Tokyo laboratory found the 0.007-carat, irradiatedgreen-blue...
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Polished Markets
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Feb 10, 2019
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Rapaport News
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GIA Sheds Light on De Beers’ Synthetics
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Two white lab-grown diamonds from De Beers’ Lightbox brandhave G color and VS clarity, the Gemological Institute of America (GIA) saidafter examining the stones. Lightbox doesn’t offer grading reports for its products, andhadn’t previously...
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Polished Markets
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Feb 07, 2019
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Joshua Freedman
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‘Lab-Grown’ Diamond Turns Out to Be Natural
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A client of the Gemological Institute of America (GIA)wrongly submitted a natural diamond as a lab-grown stone, the organizationsaid.The GIA’s Carlsbad laboratory recently received the round brilliant,2.23-carat, D-color diamond, which the customer had sent in for asynthetic-diamond...
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Polished Markets
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Feb 06, 2019
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Rapaport News
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Trade ‘Blind to Diamond-Swapping Threat’
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Diamond dealers are failing to protect themselves against stone-swapping,and are instead waiting until an expensive loss occurs before taking action, equipmentsuppliers have warned. The switching of natural diamonds with synthetics or otherlower-value goods is a common...
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Technology
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Aug 15, 2018
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Joshua Freedman
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GIA to Hold Synthetics Detection Seminars
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The Gemological Institute of America (GIA) will offer aseries of seminars this year on advanced detection of lab-grown stones. The courses, which will be taught by GIA research scientistsand classroom instructors, will combine lectures with practical...
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Polished Markets
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Jun 06, 2018
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Rapaport News
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GIA Spots Treatment Fraud with 6ct. Polished
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The Gemological Institute of America (GIA) has uncovered atreated diamond carrying a false inscription that fraudsters had apparentlycreated to make the stone appear untreated. Swindlers appear to have carefully selected a grading reportfor an untreated diamond...
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Polished Markets
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May 30, 2018
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Rapaport News
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Labs Refute Claims HPHT Escaping Detection
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Major gemological laboratories have rebuffed claims that detection machines are failing to spot synthetic diamonds that have undergone irradiation.In a trade alert last week, Diamond Services argued that the treatment, generally used...
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Technology
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Apr 25, 2018
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Leah Meirovich
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GIA Finds Synthetic Diamond with Forged Inscription
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Fraudsters forged a Gemological Institute of America (GIA)inscription on a synthetic diamond to make it appear that the stone was thetrue bearer of a natural-diamond grading report, the institute said.The engraving on the polished diamond’s girdle contained a genuineGIA report...
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Technology
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Nov 13, 2017
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Rapaport News
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De Beers to Launch Synthetics Checker
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The International Institute of Diamond Grading &Research (IIDGR) will unveil its latest synthetics detection equipment at theHong Kong Jewellery & Gem Fair this month, the De Beers subsidiary reported.The new PhosView machine allows...
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Technology
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Sep 01, 2016
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Rapaport News
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GIA Grades Largest HPHT Synthetic Diamond to Date
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The Gemological Institute of America (GIA) announced it gradedthe largest faceted blue synthetic diamond ever examined by the organization.Researchers inthe GIA’s New York laboratory inspected the emerald-cut, 5.03-carat HPHT-growntype-IIb stone produced by New Diamond...
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Technology
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Feb 25, 2016
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Rapaport News
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Technology
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Jul 22, 2015
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Ronen Shnidman
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Rough Markets
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Jul 13, 2015
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Rapaport News
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The HPHT Natural Diamond Opportunity
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Manufacturers and distributors of High Pressure High Temperature (HPHT) processed natural diamonds are claiming an opportunity for their small, specialized niche. Not to be confused with treatments or synthetics, advocates of HPHT-processed natural diamonds are working...
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Polished Markets
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May 30, 2014
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Avi Krawitz
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