IGI Grades Largest Polished Lab-Grown Diamond

The International Gemological Institute (IGI) has graded a 27-carat lab-grown stone that it claims is the world’s largest polished synthetic diamond. Indian lab-grown company Greenlab created the marquise step-cut, 27.27-carat diamond, named Om, IGI said Wednesday. The stone, which has no color enhancement, was grown using chemical vapor deposition (CVD). Along with Om, the IGI … Read more

Botswana sees Russian diamond ban opening door to synthetic gems

Botswana, Africa’s top diamond producer, sees a prolonged ban on Russian diamonds opening the way for synthetic gems to expand market share, the country’s minister told a mining conference on Monday. The United States, the world’s largest market for natural diamonds, imposed sanctions on Russia’s state-controlled Alrosa in April, aiming to cut off a source … Read more

Record Lab-Grown Stone Turns Up at GIA

The Gemological Institute of America (GIA) recently graded the largest known synthetic diamond to be created using chemical vapor deposition (CVD), it claimed Wednesday. The stone, produced by Shanghai Zhengshi Technology, is a princess-cut, 16.41 carat, G colour, VVS2 clarity lab grown diamond. Spectroscopic readings the GIA performed confirmed the stone had no post growth … Read more

Natural-Diamond Trade Hits Back at Pandora

Leading trade organizations have lashed out at Pandora’s recent statements about lab-grown stones, claiming the retailer misrepresented natural diamonds and caused harm to the industry. Pandora announced it would no longer sell mined diamonds and would instead stock synthetics, linking the decision to its environmental goals. The launch of a lab-grown line will help “transform … Read more

Pandora Taps Lab-Grown, Drops Mined Diamonds

Pandora has launched its first lab-grown jewelry line and pledged to cease using mined diamonds in any of the company’s pieces. The Danish jeweler will introduce the collection, Pandora Brilliance, in the UK on May 6, before debuting it globally in 2022, it said Tuesday. Pandora believes offering synthetics will make its products more accessible … Read more

Mumbai Bourse to Vote on Lifting Synthetics Ban

A rough lab-grown diamond

Mumbai’s Bharat Diamond Bourse (BDB) is on the verge of allowing lab-grown trading, with members due to vote on the matter next week. The board of the world’s largest diamond hub has recommended the move, arguing that better detection and increased awareness have made it easier to segregate synthetic stones from natural ones. The poll … Read more

Largest ever CVD laboratory-grown diamond hailed a “remarkable achievement”

igi-gemblog-record-setting-cvd-12.75ct

The International Gemological Institute’s (IGI) Hong Kong laboratory has certified the largest chemical vapor deposition (CVD) laboratory-grown diamond received to date. With a finished weight of 12.75 carats, this collection-quality man-made gemstone was fashioned from a 46.20 carat CVD-grown rough crystal. According to its creator, Shanghai Zhengshi Technology, it is the largest CVD lab-grown diamond … Read more

Blue Nile to Sell Lightbox Lab-Grown Diamonds

Blue Nile Lightbox

Blue Nile has launched an exclusive line of Lightbox lab-grown diamond jewelry, its first foray into synthetics in its 21-year history. De Beers-owned Lightbox seemed like the obvious choice for a partner, given the alignment of the two companies’ perspectives, Blue Nile CEO Sean Kell told Rapaport News Thursday. “We’ve been watching the lab-grown diamond market for … Read more

GIA Unveils New Lab-Grown Reports

The new GIA lab-grown diamond reports. (GIA)

The Gemological Institute of America (GIA) has launched its new grading reports for lab-grown diamonds, offering an updated look and format. The new documents, branded “LGDR by GIA,” come in digital-only form and use specific color and clarity scores rather than the descriptive terms and ranges that appeared in its previous reports, the organization said … Read more

‘Grading’ Is Just for Natural Diamonds, Says CIBJO

Polished diamonds

Laboratories should reserve the term “grading report” for natural diamonds rather than lab-grown stones, the World Jewellery Confederation (CIBJO) has urged. Lab-grown diamonds lack the rarity that underpins the concept of grading, CIBJO argued Tuesday. Instead, documents providing details of synthetics should be called “Laboratory-Grown Diamond Product Specifications,” the organization says in a new set of … Read more