Signet will integrate the online-only, natural diamond-focused jeweler into Blue Nile, which it wants to position as a higher-end retailer.
Petra Finds 121-Carat White Diamond at Cullinan
The mining company discovered the Type II diamond at the mine responsible for producing the largest rough diamond ever found.

Cullinan, South Africa--Another day, another very large diamond.
Petra Diamonds Limited announced Tuesday that a 121.26-carat white diamond has been found at the Cullinan mine, the deposit responsible for producing some of the world’s largest and rarest diamonds.
The rough stone is a white Type II diamond, meaning it has no measurable nitrogen impurities and is of top clarity and color.
Petra stated that it will sell the diamond in the last tender of its financial year, which has commenced in Johannesburg.
Cullinan was the site of discovery of the largest rough diamond ever found, the “Cullinan Diamond,” which was dug up in 1905.
Weighing 3,106.75 carats, the stone was cut into nine polished gems, including “Cullinan 1” or the “Great Star of Africa,” which is the largest white diamond in existence at 530.4 carats, and “Cullinan 2” or the “Second Star of Africa,” which weighs 317.4 carats. Both are mounted in the Imperial State Crown, one of the Crown Jewels of the United Kingdom.
The Cullinan mine also is famous for its blue diamonds. The 24.18-carat “Cullinan Dream” sold earlier this month for $25 million at auction. Christie’s said it was the largest fancy intense blue diamond ever to be sold at auction.
The “Cullinan Dream” was the largest polished stone cut from a 122.52-carat blue diamond mined at Cullinan in 2014.
The Latest

These up-and-coming jewelry brands are bringing their distinct aesthetic and unique point-of-view to the Design Atelier for the first time.

The lab’s proprietary diamond cut grade has been expanded to include the popular fancy shape.

As gold prices rise, today’s retailers are looking for alternatives at prices that will appeal to wider audiences.

This year, it’s what could happen outside of show hours that worries JSA Executive Vice President Scott Guginsky.


High-end fashion houses know how to emotionally connect with customers online. Retail jewelers should take note, Emmanuel Raheb writes.

The designers are the third cohort of mentees from the show’s Belonging @ Couture mentorship program.

With the trade and customer trust in mind, GIA® developed NextGem™ – on-demand training designed specifically for retail.

Buying discipline at trade shows starts with clarity about your inventory levels, Smith writes.

The trade show’s education series returns, with sessions on retail trends, AI, watches, marketing, corporate responsibility, and more.

The Curated Designer Project has expanded to highlight eight independent jewelry designers during CBG’s Las Vegas show.

Bring a cool tone to your summer jewelry with these white metal pieces.

The deal closed this week, which means Instore will produce the JA NY show slated to take place this fall.

The company’s jewelry sales were up in Q4 and the fiscal year, with Richemont raising prices in part because of the cost of gold.

The “Bauble” capsule collection of colorful one-of-a-kinds includes our Piece of the Week, the “Bauble” earrings, featuring rose zircon.

The updated catalog has a newly dedicated section for gift wrapping.

Everett covers colored stones’ surging popularity, the mellow return of the “Mellon Blue,” and his “The Devil Wears Prada” doppelgänger.

Fourth-generation CEO Lilly Mullen wants to emphasize experience, connection, and personalized service.

The new award, created in partnership with Henne Jewelers, honors the late designer’s legacy through supporting jewelry education.

The NYPD is warning elderly New Yorkers to keep their jewelry hidden when walking outside to avoid being a target.

Designer Viviana Langhoff has realized her dream of owning a space for her Chicago jewelry store that looks and feels like her brand.

The sessions will run from Friday, May 29, to Sunday, May 31, with one being a live taping of an episode of Couture’s podcast.

Former Stephanie Gottlieb Fine Jewelry executive Morgan P. Richardson is joining the lab-grown diamond jewelry brand.

The $400 pocket watch is a blend of Audemars Piguet’s iconic eight-sided Royal Oak and Swatch’s unserious Pop watches from the ‘80s.

With gold prices on the rise, the “Modern Electrum” collection uses an alternative, non-tarnishing metal alloy composed of gold and silver.

Fruchtman Marketing has new owners, Erin Moyer-Carballea and Manuel Carballea, and will relocate to Miami.

In a column for the 2026 State of the Majors issue, Smith lists 10 time-tested principles about sales that still ring true.



























