Lucara, HB Group Partnership Revived
It is another 10-year sales agreement in which all the larger rough recovered from the Karowe mine will go to HB Group for manufacturing.

Earlier this week, Lucara announced that the two companies had signed another 10-year sales agreement, less than six months after severing the previous agreement inked in November 2022.
As with the companies’ past agreements, the new diamond sales agreement means HB Group will purchase all 10.8-carat or larger rough diamonds that come out of Lucara’s Karowe mine in Botswana.
The price will be based on an agreed-upon estimate of the diamonds’ polished outcome with a “top-up” paid to Lucara based on how much the polished actually sells for (if applicable), less a fixed margin paid to HB Group.
“This pricing mechanism is expected to deliver regular cash flow for this important segment of the company’s production profile at better-than-conventional diamond industry tender prices,” Lucara said.
The cash flow will help the mining company continue to fund Karowe’s underground expansion, which is expected to cost an estimated $683 million.
The revival of the deal follows a rough year for Lucara.
Sales fell 17 percent year-over-year in 2023 amid a slowdown in the diamond market. The company recorded a net loss of $20.2 million, compared with net income of $40.4 million in 2022.
Commenting on the new agreement, Lucara President and CEO William Lamb said, “As we navigate through the ever-evolving landscape of the diamond industry, I’m pleased to announce Lucara’s strategic decision to re-enter into a long-term supply agreement with HB Antwerp.
“This partnership reflects our commitment to ensuring stability and sustainability in our operations.”
Lucara and HB Antwerp first entered into a sales partnership in July 2020, agreeing that HB would purchase and manufacture all Karowe’s 10.8-carat or larger rough for the remainder of the year.
Lucara announced a 24-month extension to the partnership in April 2021.
In November 2022, the two entered into a 10-year sales agreement, the agreement Lucara then terminated in September 2023 citing HB Group’s “material breach of financial commitments.”
The Latest

Sponsored by Rio Grande Jewelry Supply

The American jewelry house, founded by Latvian immigrants, has been creating American flag brooches since 1917.

The artwork celebrates the Atlanta jeweler’s legacy and symbolizes its commitment to supporting local artists and its community.

Colored gemstones, artisan finishes, mixed metals, and meaningful details are shaping demand in bridal jewelry.

Its team can evaluate jewelry and watches, as well as luxury handbags, artwork, and collectibles.


Falling oil prices were a factor in the slight month-over-month improvement.

The new offering comprises more than 120 bridal and engagement ring styles with natural and lab-grown diamonds.

DCA is preparing the next generation of professionals by supporting workforce development, leadership growth, and career advancement.

The clock is part of the celebration for the soon-to-open Rolex headquarters on New York City’s Fifth Avenue.

The public relations professional is remembered for her benevolent generosity and unwavering commitment to those around her.

The new watch commemorates Pokémon’s 30th anniversary.

The luxury retailer is now called Exemplar Luxury Group.

The “Lady” collection is a new take on old beauty standards with gemstone-adorned hair pins and combs, a compact mirror necklace, and more.

All active members who earned their credential or designation before Dec. 1, 2025, are required to recertify.

The new jewelry collection uses a colorful palette of onyx, malachite, tiger’s eye, mother-of-pearl, lapis, turquoise, and coral.

Lee Michaels Fine Jewelry is celebrating 30 years in the Ridgeland, Mississippi community.

Sean Milliner has joined the company.

Classes will begin in August at GIA’s new Canary Wharf location.

A ring set with “hogback” diamonds, an early stone cut dating to around the 16th century, sold for more than $20,000 at a U.K. auction.

The rainbow version of the ring, our Piece of the Week, features angel-cut, octahedral lab-grown sapphires designed to be worn as armor.

The new initiative donates a portion of the proceeds from select charms to charitable causes.

The Brooklyn-based jeweler created a limited-edition version of its “Aura” eternity band, set with gemstones in the team’s colors.

Dallow will lead the International Colored Gemstone Association, effective July 6.

Senior Editor Lenore Fedow headed to Savannah to learn more about the 10-year, $10 million partnership between JM and the art school.

Its new capsule jewelry collection features gold-finished stainless steel pieces designed for a maximalist look without a luxury price tag.

The week-long event in Geneva is slated for April 2027.

The three industry leaders bring financial, communications, and legal expertise to the nonprofit’s board of directors.























