London Jewelers Unveils 20.26-Carat Diamond for Its 100th Anniversary

London Jewelers has unveiled a 20.26-carat D Flawless Old Mine Cushion cut diamond, cut from a 63-carat rough in Botswana, to mark its 100th anniversary. The retailer said the stone was produced with De Beers Group and Grandview Klein Diamonds. Yahoo reported the unveiling.

London Jewelers' Centennial Diamond

London Jewelers showed the diamond with Grandview Klein Diamonds at JCK Las Vegas in May. The final weight of 20.26 carats was chosen to commemorate the family's 100th milestone in 2026. The original rough was cut in its country of origin, Botswana, by Grandview Klein Diamonds as part of the Origin De Beers Group program.

"This is a natural fit," said Mark Udell, chief executive officer of London Jewelers. "De Beers Group has access to some of the world's most exceptional diamonds, and we've spent generations building trust with our clients by offering not only extraordinary diamonds, but a complete experience built on expertise, integrity and lasting relationships."

The De Beers Group program traces a natural diamond's journey from rough to polish with verified ownership. Its Origin digital experience uses blockchain technology to let clients follow the diamond from discovery to finished stone. The Old Mine Cushion style was developed in the 1700s and shaped by hand before modern technology existed.

"We are cutting a new diamond in an old style because we honor our past, but we are shaping the future," said Scott Udell, vice president of London Jewelers.

London Jewelers' Scale and Partnerships

London Jewelers is a family-owned luxury jewelry and timepiece retailer operating 16 boutiques across Long Island and New Jersey, according to akta.pro company records. The company was founded in 1926 by Polish emigre Charles London in Glen Cove, Long Island, and is marking its centennial in 2026. It is an Official Rolex Jeweler with dedicated Rolex boutiques at Americana Manhasset, East Hampton, and The Mall at Short Hills, and an authorized Patek Philippe retailer with boutiques at Americana Manhasset and The Mall at Short Hills. It also operates a dedicated Cartier boutique at Americana Manhasset.

Watch Fair and Vacheron Constantin Pop-Up

London Jewelers marked its 100th anniversary with its 16th annual Watch Fair, held October 23-25 in Manhasset, the New York Post reported. The company, founded in 1926, has expanded to five locations and will open a renovated flagship store early next year, according to the same report.

In August, Vacheron Constantin opened an exclusive summer pop-up called "The Vacheron Constantin Hamptons Summer Lounge" at London Jewelers' East Hampton boutique on Main Street, running through September 6, the New York Post reported.

Renovated Flagship Store

London Jewelers will open a renovated flagship store early next year, the New York Post reported. The company's 16th annual Watch Fair ran October 23-25 in Manhasset.