The Prestige Edit
Luxury FashionWatches & JewelryTravel & ExperiencesLuxury Living
Trending
Luxury FashionLuxury GoodsLuxury TravelLuxuryLuxury TravelSustainabilityFashion IndustryVan Cleef & Arpels
The Prestige Edit—Curating the Finest in Luxury Living
Luxury FashionWatches & JewelryTravel & ExperiencesLuxury LivingPremium Brands|WritersContactPrivacyTerms

© 2026 The Prestige Edit. All rights reserved.

  1. Home
  2. /Watches & Jewelry
  3. /London Jewelers unveils centennial rare diamond with Grandview Klein
Watches & Jewelry

London Jewelers unveils centennial rare diamond with Grandview Klein

At a private event during JCK Las Vegas on May 29, London Jewelers unveiled a 63-carat rough diamond that will be meticulously transformed into a 20.

HC
Henry Caldwell

June 10, 2026 · 3 min read

A large, rough 63-carat diamond is displayed in a vault, symbolizing London Jewelers' centennial celebration and partnership with Grandview Klein.

At a private event during JCK Las Vegas on May 29, London Jewelers unveiled a 63-carat rough diamond that will be meticulously transformed into a 20.26-carat D Flawless Old Mine Cushion-cut jewel in Botswana, commemorating the company's 100th anniversary, according to Rapaport and Centurion Jewelry Show. This collaboration with Grandview Klein Diamonds marks a significant milestone, blending heritage with a commitment to exceptional craftsmanship and strategic partnerships, launched at a premier industry event.

A diamond's ultimate value is often perceived in its flawless, polished state, but its story and provenance are increasingly rooted in its rough, natural origin and the journey it takes. This shift redefines luxury.

Companies are increasingly investing in transparent, traceable sourcing and bespoke craftsmanship to differentiate their luxury offerings and meet evolving consumer demands for authenticity and ethical responsibility.

The Diamond's Raw Potential

London Jewelers is unveiling a 63-carat natural rough diamond to commemorate its 100th anniversary, according to Vuenj. The 63-carat rough diamond underscores the rarity and scale of London Jewelers' centennial commemoration, highlighting its natural origin. This initiative by London Jewelers and Grandview Klein Diamonds emphasizes valuing the initial state of the stone, as they will jointly unveil the rough diamond, according to Instoremag.

From Rough to Refined: The Transformation

The rough diamond will be transformed into a 20.26-carat D Flawless Old Mine Cushion-cut diamond, according to Vuenj. The meticulous process of transforming a 63-carat rough into a D-Flawless, Old Mine Cushion-cut diamond highlights the pinnacle of diamond cutting artistry and value creation. The significant weight reduction from the 63-carat rough to the 20.26-carat polished stone emphasizes artistry and story over mere carat weight, elevating perceived value beyond traditional metrics, as the rough diamond will be cut into a 20.26-carat old mine cushion-cut, D-flawless polished diamond, Rapaport reports.

A Century of Legacy and Ethical Sourcing

The diamond will be cut in Botswana as part of the Origin De Beers Group program, which will document its journey, according to Rapaport. The project not only celebrates a century of luxury but also champions transparency and ethical sourcing through its partnership in Botswana. London Jewelers is not just selling a diamond; they are selling a transparent, ethical narrative, forcing competitors to either invest heavily in similar provenance tracking or risk being perceived as opaque and less responsible.

The Diamond's Future Journey

The unveiling will take place in Botswana, according to Instoremag. While the initial unveiling of the rough diamond occurred in Las Vegas, the planned unveiling in Botswana underscores a commitment to local beneficiation and transparent sourcing within the diamond industry. The multi-stage approach emphasizes both the diamond's origin and its transformation journey, addressing the varying reports on unveiling locations.

Frequently Asked Questions

What is the rarest diamond in the world?

The rarest diamonds in the world are typically colored diamonds, particularly red, blue, or green varieties, especially those over one carat. Their scarcity and unique chemical compositions make them exceptionally valuable and sought after by collectors.

What are the most famous diamonds?

Several diamonds hold global renown, including the Hope Diamond, known for its deep blue hue and storied history. Other famous examples include the Cullinan Diamond, the largest gem-quality rough diamond ever found, and the Koh-i-Noor diamond, part of the British Crown Jewels.

When was London Jewelers founded?

London Jewelers was founded in 1926, making the upcoming unveiling of their centennial diamond a celebration of their 100th anniversary. This long-standing heritage in luxury retail positions the company as a significant player in the high-end jewelry market.

Tags

DiamondsLuxuryJewelryAnniversaryGemstonesLondon JewelersGrandview Klein
HC

Henry Caldwell

Watches & Jewelry Writer

Henry Caldwell is the Watches & Jewelry Writer for The Prestige Edit, covering horology, fine jewelry, and high-value collectibles. He brings a discerning eye to his coverage, focusing on the artistry, history, and investment potential of luxury timepieces and precious gems.

More from Watches & Jewelry

Gabriella’s Jewels Best Sellers for Polished Gifts and Statement Favorites

Gabriella’s Jewels Best Sellers for Polished Gifts and Statement Favorites

Choosing the right everyday jewelry can feel overwhelming amidst a sea of options. For those seeking affordable, stylish, and durable pieces, Gabriella's Jewels presents a collection centered on tarnish-resistant designs…

Charles Pembroke· Jul 20
Interior of the expanded Beaverbrooks Loupe boutique in Sheffield, featuring elegant display cases filled with luxury watches.

Beaverbrooks expands Sheffield Loupe boutique to offer luxury watches

After 187 years, Sheffield's H.

Henry Caldwell· Jul 20
A stylish woman in the 1980s fashion era, adorned with large, eye-catching oversized hoop earrings and bold statement necklaces.

Oversized 1980s Jewelry Defines New Statement Trends

Sales of authentic 1980s earrings—oversized hoops, discs, excessive crystals, and pearls—have surged by 30 percent on Susan Caplan's site, signaling a dramatic return to maximalist jewelry, according

Henry Caldwell· Jul 19
A breathtaking Van Cleef & Arpels necklace from the Fascinating Egypt collection, inspired by ancient Egyptian art and engineered for modern transformability, displayed in a luxurious setting.

Van Cleef & Arpels Unveils Fascinating Egypt 2026 High Jewellery Collection

A single necklace from Van Cleef & Arpels' new 'Fascinating Egypt' collection required up to 4,000 hours of work and can transform into multiple pieces, blurring the lines between ancient inspiration

Henry Caldwell· Jul 18

Trending Now

1
A visual metaphor for the quiet luxury paradox, showing minimalist fashion giving way to vibrant, expressive styles, symbolizing a new era in high fashion trends.

The Quiet Luxury Paradox: Why Its Mainstream Moment Signals a New Era

Luxury Fashion· 12 views
2
Four impeccably dressed men showcasing diverse luxury menswear styles from emerging brands, set against a sleek, modern city backdrop, symbolizing the future of men's fashion in 2026.

Top 4 Emerging Luxury Fashion Brands Redefining Men's Style in 2026

Luxury Fashion· 4 views
3
Raksha Narayan Kotian, the new Business Head of Coração Do Vale India, overlooking a cityscape with a bottle of luxury olive oil.

Raksha Narayan Kotian Leads Coração Do Vale India as New Business Head

Premium Brands· 9 views
4
Elegant members in a luxurious, exclusive private club lounge, networking discreetly amidst opulent decor, symbolizing global influence and high society connections.

The Top 7 Most Exclusive Private Members' Clubs Redefining Global Society in 2026

High Society· 5 views
5
An opulent Gilded Age grand ball scene with elegantly dressed attendees dancing under sparkling chandeliers, showcasing the historical luxury and exclusivity of high society rituals.

The Enduring Allure: A History and Significance of Grand Balls and High Society Rituals

High Society· 5 views
6
A group of models showcasing avant-garde Belgian fashion designs, featuring intricate textiles and bold silhouettes, in a dramatic, industrial-chic setting with spotlights.

The 7 Most Influential Belgian Fashion Designers to Know

Luxury Fashion· 6 views