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Lab Grades Its Largest CVD Diamond
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The International Gemological Institute’s (IGI) Hong Kong laboratory has graded a 12.75-carat synthetic diamond, the largest chemical vapor deposition (CVD) stone it has ever received.The lab-grown stone, cut from a 46.20-carat rough, has...
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Polished Markets
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Nov 26, 2020
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Rapaport News
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WD Opens Up Lab-Grown Patents to Distributors
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WD Lab Grown Diamonds has entered into patent sublicensing agreements with two synthetics companies, enabling them to distribute chemical vapor deposition (CVD) stones in North America and beyond.The deals with Altr and Altr...
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Financial-Legal
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Oct 25, 2020
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Rapaport News
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De Beers Scores Partial CVD Patent Victory
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A court has awarded a limited victory to De Beers’ synthetic-diamond production unit in a patent dispute with Singapore-based grower IIa Technologies.IIa infringed an Element Six patent related to diamond material that’s usable for lab-grown diamond jewelry and...
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Financial-Legal
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Feb 09, 2020
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Rapaport News
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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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