The 9.51-carat fancy vivid blue diamond, which set two world auction records at Sotheby’s in 2014, is estimated to fetch up to $30 million.
Company grows 10-carat colorless diamond
The International Gemological Institute Hong Kong has certified what it believes is currently the world’s largest colorless synthetic diamond--a 10.02-carat square emerald-cut stone grown by New Diamond Technology.

Hong Kong--The International Gemological Institute Hong Kong has certified what it believes is the world’s largest colorless synthetic diamond--a 10.02-carat square emerald-cut stone.
The Type IIa diamond been certified as VS1 clarity, E color, with a very good-excellent finish.
The stone was cut from a record-breaking 32.26-carat piece of rough, which was lab grown by Saint Petersburg, Russia-based New Diamond Technology in less than 300 hours.
The 10-carat diamond is unique in all aspects, according to IGI co-CEO Marc Brauner, with its large size, very high color, and brilliance. He said in a company statement that, “the science and technology behind the processes synthesizing this stone are significantly more advanced than other man-made diamonds currently on the market.”
New Diamond Technology unveiled the stone at their booth during the recent JCK Las Vegas show.
It comes only two months after IGI Hong Kong certified a 5-carat radiant-cut brilliant and 4-carat-cushion-cut brilliant diamond also grown by New Diamond Technology that were, at the time, thought to be the world’s largest man-made diamonds.
The Latest

The industry veteran joins the auction house as it looks to solidify its footprint in the jewelry market.

The nonprofit awarded four students pursuing a professional career in jewelry making and design with $2,250 each.

With their unmatched services and low fees, reDollar.com is challenging some big names in the online consignment world.

The Texas-based jeweler has also undergone a brand refresh, debuting a new website and logo.


The two organizations have finalized and signed the affiliation agreement announced in May.

The single-owner sale will headline Sotheby's inaugural jewelry auction at the Breuer building, its new global headquarters, this December.

Jewelers of America is leading the charge to protect the industry amidst rising economic threats.

From sunrise yoga to tariffs talks, these are some events to check out at the upcoming inaugural event.

Smith recalls a bit of wisdom the industry leader, who died last week, shared at a diamond conference years ago.

The “Victoria” necklace features a labradorite hugged by diamond accents in 18-karat yellow gold.

Two lower courts have moved to block the import taxes, which will remain in place as the legal battle continues.

The Kansas City Chiefs quarterback shares Hublot’s dedication to pursuing greatness, the Swiss watchmaker said.

Breitling is now the NFL’s official timepiece partner, a move that puts the brand in front of the millions of Americans who watch football.

NYCJAOS is set for Nov. 21-23 in New York City’s Chelsea neighborhood.

U.S.-based investment company SMG Capital LLC is the new owner of the luxury brand.

A new court filing details the locations of the stores that will close, as well as the 830 that will remain open.

The new catalogs are “Tools, Equipment, & Metals” and “Findings & Metals.”

Sapphire’s variety of colors make it the perfect birthstone for September.

The retailer has raised its guidance after seeing total sales increase 3 percent in the second quarter, beating expectations.

Niccolò Rossi di Montelera, executive chairman of the board, was appointed as interim CEO.

The three-floor space also features the jeweler’s largest VIP salon in Japan and offers an exclusive diamond pendant.

The collection is a collaboration between Stephanie Gottlieb Fine Jewelry and Oak and Luna, focusing on understated essentials.

The highlight of a single-owner jewelry and watch collection, it’s estimated to fetch up to $7 million at auction this December.

CEO Efraim Grinberg noted a resurgence in the fashion watch market.

The “Bullseye” necklace, with vintage bakelite and peridot, August’s birthstone, is the perfect transitional piece as summer turns to fall.