synthetic diamonds – Page 2 – The Diamond Certification Laboratory of Australia (DCLA)

De Beers Adds Grading Specs for Lightbox

Lightbox has added grading information for its synthetic white diamonds in an effort by the De Beers brand to bring further transparency to the lab-grown sector.

The company will provide technical specifications showing the minimum quality of its stones across cut, color, clarity and carat weight, Lightbox said Monday. It will include these descriptions with each white lab-grown diamond it sells, but will not grade each stone individually. The specifications are based on internationally recognized grading standards, the De Beers-owned company noted.

“This new feature is just one more way Lightbox can instill consumer confidence,” the company added.

An infographic with the information is also available on Lightbox’s website. Those specifications list its synthetic white diamonds to be “near colorless” or better, which the company defines as between G to J, meaning only a trained gemologist can detect a trace of color. The stones all have a minimum clarity of VS, and a cut of “very good.” The stones are still priced at $800 per carat.

Lightbox, which De Beers launched in 2018, does not currently intend to offer grading information for its blue or pink lab-grown diamonds.

Source: Diamonds.net

De Beers Scores Partial CVD Patent Victory

Synthetic colored diamonds at Element Six in Oxford UK De Beers

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 industrial applications, according to a High Court of Singapore judgment Friday. However, another Element Six patent for post-growth color treatment is invalid, judge Valerie Thean also ruled.

“We will continue to be vigilant for any other potential infringement of our [intellectual-property] rights around the globe,” Element Six CEO Walter Hühn said in a statement Friday. “We will defend our rights vigorously — just as any company would — because protecting our ability to get a full return on our investment in [research and development] is vital to our future.”

UK-based Element Six produces synthetic diamonds for De Beers’ lab-grown jewelry brand, Lightbox, and supplies diamond material for industrial and technological uses. The patent it successfully defended, SG 872, was relevant to optical applications such as infrared spectroscopy and high-power laser optics, as well as to the creation of stones for jewelry, De Beers explained.

IIa, which grows CVD goods for distributor and sister company Pure Grown Diamonds (PGD), must stop making, using, importing or maintaining possession of products that infringe patent SG 872, Thean ordered. She also called for the cancellation of Element Six’s patent SG 508, which relates to the annealing of chemical vapor deposition (CVD) diamonds.

“IIa Technologies has developed its proprietary process in the last 15 years, and is proud of the work we have done to bring lab-grown diamonds to the world,” Vishal Mehta, IIa’s CEO, said in a separate statement. “The current judgment will be considered in its entirety, and then the company will take necessary steps to protect its interests.”

The lawsuit, which Element Six filed in 2016, comes amid heightened patent-related legal activity in the synthetic-diamond sector. Last month, WD Lab Grown Diamonds sued six companies — including IIa and PGD — accusing them of infringing its patents for synthesis and treatment.

Source: Diamonds.net

Russia’s major diamond mining firms including Alrosa have urged India to amend consumer laws on synthetic diamonds so that there is clarity on the quantity of synthetic diamonds entering the country and how they are being used.

Industry executives said that around 5 million carats of synthetic diamonds are produced globally, and the volume is increasing, causing concern to rough diamond producers. A senior executive, who did not wish to be identified, told the Economic Times that a meeting was recently held between India and Russia on synthetic diamonds.

“India is the chair of the Kimberley Process Certification System (KPCS) for 2019 and the Russian Federation is the vice chair. The KPCS is a joint initiative of 54 members, including India and the European Union, to stem the flow of ‘conflict diamonds’ that are used by rebel groups to overthrow legitimate governments.

It came into effect on January 1, 2003 through a United Nations General Assembly Resolution and includes governments, civil society and industry.”

“During the meeting between Aleksey Vladimirovich Moiseev, the KPCS vice chair 2019 and deputy minister of finance of the Russian Federation Peter Karakchiev, Alrosa’s head of international relations department and other senior representatives of the Russian foreign office it was decided that the KPCS should work towards having separate HS (harmonized system) code implemented for synthetic rough diamonds at the national level and encourage participant countries to expedite the process of implementation.

Source: IDEX

Signet Enters Lab-Grown Market

James Allen has launched sales of lab-grown diamonds, marking parent company Signet Jewelers’ entry into the synthetics market.

The e-commerce business, which Signet acquired in 2017, now gives consumers the option of “earth-created” or “lab-created” stones on its retail page. James Allen is offering lab-grown as center stones for engagement rings, promising “up to 30% more size for the same cost.” At press time, the prices of lab-grown on the site ranged from $450 for a radiant, 0.52-carat stone to $48,350 for an emerald-cut, 4.49-carat diamond.

All its lab-grown diamonds will carry grading reports from laboratories such as the International Gemological Institute (IGI) or the Gem Certification & Assurance Lab (GCAL). The colors available on the James Allen site range from D to J, while clarities span from internally flawless to SI2.

Analysts were expecting Signet to move into the lab-grown market, after Gina Drosos, its CEO, said last year it was assessing demand, and would position itself to offer the category if consumers wanted it. It has taken a different approach from De Beers, which launched its Lightbox fashion-jewelry line a year ago with a standard price of $800 per carat and no grading reports.

Mined diamonds are still “the traditional choice,” James Allen notes in the questions-and-answers section of its site. But it emphasizes that its lab-grown stones are chemically identical and look the same as naturals, and that they are graded to the same standards.

Signet views James Allen as an incubator for testing out ideas, Drosos observed in an investor call in December. Late last year, it launched a concept store for the brand in Washington, DC, featuring new retail technology.

Source: Diamonds.net

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Labs Refute Claims HPHT Escaping Detection

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 to alter the color of a stone, can mask the phosphorescence effect when diamonds created using High Pressure-High Temperature (HPHT) undergo scanning at room temperature.

While detection machines can often identify HPHT diamonds because they phosphoresce — or glow — under ultra-violet light, certain devices fail to spot some of those stones that have been subject to irradiation, the Hong Kong-based diamond-technology company argued.

However, De Beers and the Gemological Institute of America (GIA) have denied the impact of such a phenomenon on their machines’ ability to sift out HPHT synthetics.

“The International Institute of Diamond Grading and Research (IIDGR) confirms that its instruments AMS2, SYNTHdetect, DiamondView and DiamondSure are all effective at screening HPHT synthetic material which has been irradiated and is tested at room temperature,” the De Beers-owned grading unit said in a statement last week.

“Any business using these devices can have full confidence that any such material will be detected without the need to undertake tests at different temperatures,” it added.

Meanwhile, although detection devices based on phosphorescence may not be able to detect some HPHT-grown irradiated synthetics, the GIA’s machines can spot them, the Carlsbad, California-headquartered laboratory stressed.

“The ability of the instruments that GIA uses to differentiate natural diamonds from HPHT and CVD [chemical vapor deposition]-grown synthetic diamonds, including the GIA iD100 gem-testing device and the GIA Melee Analysis Service, is not affected by irradiation treatment,” the GIA told Rapaport News.

Examining diamonds at the temperature of liquid nitrogen can be an extremely accurate method of detecting synthetics, while a technique called Raman spectroscopy is a simple way of spotting irradiated diamonds, according to Joseph Kuzi, founder and president of Diamond Services.

“Our latest findings indicate that the diamond and jewelry trades should show extra caution, but we do not claim that irradiated HPHT-grown synthetic diamonds are undetectable,” Kuzi said.

Source: Diamonds.net