Lucara has recovered a “stunning” Type IIb blue diamond of nearly 37 carats at its Karowe mine in Botswana, discovered using X‑ray sorting technology. A stone of this size and classification immediately draws strong attention from the high‑jewelry market and collectors, reinforcing the premium placed on large natural blues and verifiable provenance.

  • Weight: nearly 37 carats (as reported)
  • Type: Type IIb blue diamond
  • Discovery: detected via X‑ray technology at Karowe mine, Botswana
  • Market focus: high‑jewelry collectors and auction houses

Context: where this fits in current trends

The recovery underscores two converging trends in 2025–26: continued demand for large, natural colored diamonds and the increasing role of detection and traceability technologies in mine operations. Karowe has been a consistent source of notable large stones; an X‑ray‑assisted recovery reduces damage risk and improves yield of intact material, preserving the vitreous luster and substantial heft that determine high‑end value.

Impact: what this means for the US market

For US retailers and auction specialists, the find signals sustained appetite among well‑capitalized buyers for rare natural blues—an inventory category that supports higher margins and requires provenance-led marketing. Merchandisers should consider sharpening messaging around origin and detection methods, while wholesalers and investors will monitor whether similar recoveries affect supply of large colored stones. For designers, the piece size and Type IIb classification invite settings that showcase color and heft—open‑backed mounts and low‑profile knife‑edge shanks that preserve light return and permit close inspection by knowledgeable clients.

Lucara’s announcement is a timely reminder that mine‑level technology and documented origin increasingly factor into valuation for the top tier of the colored‑stone market, particularly in the US where collectors weigh both rarity and traceability when underwriting price.

Image Referance: https://nationaljeweler.com/articles/14793-lucara-recovers-nearly-37-carat-blue-diamond