IndependentsMay 21, 2024
State of Retail: 4 Retail Design Trends for 2024From lighter color palettes to the integration of AR, experts offer inspiration for jewelers in need of an aesthetic refresh.
GradingOct 19, 2016
GIA Examines 5- and 10-Carat Lab-Grown Diamonds
The laboratory said the 5.19-carat diamond represents a “significant milestone” in CVD diamond growing.
Examined by the GIA’s Hong Kong laboratory, this 5.19-carat CVD synthetic diamond is J-equivalent color and VS2-equivalent clarity. It is one of two lab-grown diamonds discussed in research articles published recently by the lab. (Photo credit: Johnny Leung and Tony Leung, courtesy of GIA)
Carlsbad, Calif.--The Gemological Institute of America recently examined two large lab-grown diamonds submitted to its Hong Kong lab, one of which represents a “significant milestone” in diamond growing.
In a research article authored by Billie “Pui Lai” Law and Wuyi Wang, the GIA said it recently examined a 5.19-carat diamond grown using the chemical vapor deposition process.
The stone, which is J-equivalent color and VS2-equivalent clarity, is the largest CVD-grown diamond examined by the lab to date, and the largest ever reported in the jewelry industry.
Breaking the 5-carat barrier is a “significant milestone” for CVD technology, which has been producing bigger diamonds in recent years, a trend that’s expected to continue.
As the GIA noted, “As diamond growth techniques continue to advance, we expect to see more high-quality samples, both in size and clarity.”
The article also stated that the 5.19-carat diamond was submitted to the lab without proper disclosure.
However, the GIA was able to identify it as a CVD synthetic using its standard screening and testing processes, though the lab noted that black inclusions, which often are contained in synthetic diamonds, were not found in this CVD diamond, meaning it could have been mistaken as a mined diamond if only microscopic examination was used.
The identification of this lab-grown diamond “highlights the importance of using advanced spectroscopic instruments as well as conventional gemological techniques to ensure an accurate identification,” the GIA said.
The second article, authored by Wang and Terry “Ping Yu” Poon, discussed the examination of a 10.08-carat blue diamond grown by St. Petersburg, Russia-based New Diamond Technology. NDT is the same company that grew the 5.03-carat blue diamond examined by the GIA’s New York laboratory earlier this year.
Grown using the high-pressure, high-temperature method and disclosed as a synthetic diamond by NDT, the stone is the largest HPHT-grown diamond recorded to date.
The GIA said the emerald-cut stone has a color grade equivalent to fancy deep blue.
More on Grading
The Latest
AuctionsMay 21, 2024
Dame Shirley Bassey’s Diamonds Are Ready for Their EncoreSotheby’s will auction jewelry belonging to the “Diamonds Are Forever” singer in Paris this October.
ColumnistsMay 21, 2024
Successful Vendor Relationships: A Win-Win ApproachSherry Smith shares tips for fostering successful vendor-retailer partnerships, from marketing investment to fast-seller replenishment.
Brought to you by
Meet Gemology’s Next Generation Microscope: GIA® Gemolite® NXT Professional EditionGIA®’s most advanced microscope has new features to optimize greater precision and comfort.
IndependentsMay 21, 2024
Jennifer Herold Promoted to VP at IJOHerold has been with the organization for 22 years and will continue in her current role of conference director.
Weekly QuizMay 16, 2024
This Week’s QuizTest your jewelry news knowledge by answering these seven questions.
MajorsMay 20, 2024
Studs Opens Luxury Piercing Pop-Up in NYC“Fancy Studs” will feature revamped branding and a new lab-grown diamond fine jewelry collection.
SourcingMay 20, 2024
2 Business-to-Business Platforms Secure Millions in Funding Nivoda and Liquid Diamonds both have big plans for the new capital.
Brought to you by
Record Gold Prices Have Consumers Undeterred. Here’s Why.Despite the rising prices, consumers continue to seek out the precious metal.
MajorsMay 20, 2024
Stuller Issues New Packaging & Display CatalogThe 2024-2025 edition features new colors and styles, as well as storytelling elements.
SourcingMay 20, 2024
State of the Diamond Industry: Botswana Beyond DiamondsFrom moringa to ecotourism in the Okavango Delta, the country and its leaders are exploring how Botswana can diversify its economy.
SourcingMay 20, 2024
Anglo American Confirms It Is Looking to Sell De Beers The mining giant also wants to offload its platinum business as part of an overhaul designed to “unlock significant value.”
FinancialsMay 17, 2024
Richemont Appoints Van Cleef & Arpels’ Nicolas Bos as New CEOThe announcement coincided with its full-year results, with growth driven by its jewelry brands.
FinancialsMay 17, 2024
Watches of Switzerland’s Fiscal-Year Sales Flat Looking ahead, the retailer said it sees “enormous potential” in Roberto Coin’s ability to boost its branded jewelry business.
Recorded WebinarsMay 17, 2024
Watch: Preparing for Trade Show SuccessJewelry trade show veterans share strategies for engaging buyers, managing your time effectively, and packing the right shoes.
AuctionsMay 17, 2024
Piece of the Week: Cartier’s Ring-Tailed LemurThis little guy’s name is Ricky and he just sold for more than $200,000 at Sotheby’s Geneva jewelry auction.
AuctionsMay 16, 2024
Christie’s Holds 2 Sales Despite CyberattackThough its website has been down for a week, Christie’s proceeded with its jewelry and watch auctions on May 13-14, bringing in nearly $80 million.
AuctionsMay 16, 2024
Sotheby’s Withdraws 101-Carat Yellow Diamond from AuctionDespite the absence of “The Allnatt,” Sotheby’s Geneva jewelry auction totaled $34 million, with 90 percent of lots sold.
ColumnistsMay 16, 2024
The PR Adviser: What the Designer Should’ve DoneLilian Raji gives advice to designers on how to make the most of great publicity opportunities.
SourcingMay 16, 2024
Lucapa to Shed Stake in Lesotho Diamond Mine The mining company wants to divest its 70 percent holding in the Mothae Diamond Mine in an effort to streamline its portfolio.
ColumnistsMay 15, 2024
Squirrel Spotting: Why Retailers Struggle to Fire BrandsWhy do so many jewelers keep lines that are not selling? Peter Smith thinks the answer lies in these two behavioral principles.
AuctionsMay 15, 2024
Red Diamond Breaks Records at Phillips GenevaThe “Argyle Phoenix” sold for more than $4 million at the auction house’s second jewels sale.
Events & AwardsMay 15, 2024
See Who’s in JA’s 2024 ‘20 Under 40’ ClassThe annual list recognizes young professionals making an impact in jewelry retail.
IndependentsMay 15, 2024
David Mann Jewelers in Upstate NY to Close After 35 YearsOwner David Mann is heading into retirement.
FinancialsMay 15, 2024
Brilliant Earth’s Sales Fall Flat in Q1 While overall sales were sluggish, the retailer said its non-bridal fine jewelry was a popular choice for Valentine’s Day.
AuctionsMay 14, 2024
2 Huge Yellow Diamonds Are Heading to AuctionChristie's is selling one of the diamonds, moving forward with its Geneva jewelry auction despite the cyberattack that took down its website.
MajorsMay 14, 2024
Platinum Born Taps ‘Born Leaders’ for New CampaignThe ad aims to position platinum jewelry as ideal for everyday wear.
Lab-GrownMay 13, 2024
Lab-Grown Diamond Brand Lightbox Cuts Prices by 25 to 40%The move follows a price-drop test run in Q4 and comes with the addition of a “quality assurance card” from GIA for some loose diamonds.
