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WD Sues Diamond Growers over CVD Patents
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The companies behind WD Lab Grown Diamonds have filed three lawsuits against competitors, accusing them of infringing patents for diamond synthesis and treatment. The Carnegie Institution of Washington, a science organization, and M7D Corporation,...
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Financial-Legal
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Jan 12, 2020
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Rapaport News
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Lab Warns of Color Instability in CVD
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Synthetic diamonds grown using chemical vapor deposition (CVD) could change color for an extended period following exposure to certain light forms, Gemological Science International (GSI) has warned. When testing a 2-carat CVD diamond,GSI...
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Technology
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Dec 04, 2019
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Leah Meirovich
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Lab-Grown Sector Gears Up for Eco Audit
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Six synthetic-diamond companies have signed up for apilot program aimed at creating a sustainability standard for the sector. SCS Global Services, a third-party auditing specialist,will analyze companies’ environmental, social and governance records, with thegoal...
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Polished Markets
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Oct 15, 2019
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Rapaport News
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GIA Spots Natural-Synthetic Hybrid Diamond
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The Gemological Institute of America (GIA) has discovered asynthetic layer that improved the weight and color of a natural diamond, and haswarned that the phenomenon may be happening more often.The cushion modified brilliant, 0.64-carat...
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Technology
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May 20, 2019
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Rapaport News
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Dubai Exchange Holds First Lab-Grown Tender
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The Dubai Multi Commodities Centre (DMCC) will offer rough lab-grown diamonds at tender for the first time, as it aims to diversify the emirate’s trade. The sale, which will be run by Hong Kong-based diamondtrading firm...
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Rough Markets
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May 12, 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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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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Adamas Acquires Synthetics Producer Scio
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Nevada-based Adamas One Corp. has bought all assetsbelonging to Scio Diamond, a producer of lab-grown diamonds. Adamas will pay $3.3 million over 18 months to cover Scio’s secured debt, according to a December 11 filing with the US Securities...
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Polished Markets
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Dec 30, 2018
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Rapaport News
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Pink Synthetic Displays Rare Treatment
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A pink diamond recently submitted to the Central GemLaboratory (CGL) in Tokyo was found to be a chemical vapor deposition (CVD)synthetic stone, treated only with Low Pressure-High Temperature (LPHT). The marquise brilliant-cut, 0.192-carat diamond is an unusualfind, as stones...
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Research
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Dec 17, 2018
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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 Grades ‘Largest’ Lab-Grown Pink
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The Gemological Institute of America (GIA) has graded a5.01-carat lab-grown diamond that, its producer claims, is the largest pinksynthetic diamond in the world. New York-based Unique Lab Grown Diamond created the stone usingchemical...
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Polished Markets
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Jul 04, 2018
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Rapaport News
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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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9ct. Synthetic Stone Sets ‘World Record’
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WD Lab Grown Diamonds has created what it claims to be theworld’s largest known synthetic diamond made using chemical vapor deposition(CVD). The ideal-cut, round brilliant, 9.04-carat, VS2-clarity stonebroke the synthetic-diamond producer’s own previous world...
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Polished Markets
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May 27, 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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Lab Finds 3ct. Synthetic with Fake Report
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A grading laboratory in China has discovered a synthetic diamond masquerading as a natural stone, complete with a forged inscription and a falsified report.The National Gemstone Testing Center (NGTC) in the city of Shenzhen received a round-brilliant, 3.1-carat diamond ring,...
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Technology
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Apr 15, 2018
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Joshua Freedman
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US Lab Creates 6ct. CVD Synthetic
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WD Lab Grown Diamonds has created and sold a round, 6-caratsynthetic diamond that it claims is the first of its size and shape made usingthe chemical vapor deposition (CVD) technique. “We’re excited about our new...
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Manufacturing
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Feb 01, 2018
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Rapaport News
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Lab Spots Stone with CVD Coating
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A Chinese gemological laboratory has identified awell-concealed synthetic-diamond coating that bolstered the size of a small naturalstone. While the lower part of the stone was a colorless, naturaldiamond, the upper section, including the crown and...
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Polished Markets
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Dec 07, 2017
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Rapaport News
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GIA Finds Baffling Flaw in CVD Diamond
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The Gemological Institute of America (GIA) doesn’t usuallydeclare itself stumped, but a recent discovery of a flaw in a synthetic diamondthat’s almost always associated with natural stones left scientists scratchingtheir heads.Gemologists studying a round, brilliant-cut, 0.26-carat,pink laboratory-grown...
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Technology
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Jul 02, 2017
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Joshua Freedman
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GIA Spots Natural Diamond with CVD Blue Layer
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The Gemological Institute of America (GIA) has found anatural diamond with a synthetic coating that tints it blue – and has warned thatmore such hybrids might be on the market.The 0.33-carat stone, which had been graded...
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Technology
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May 04, 2017
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Rapaport News
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