World’s Largest Half-Pink Diamond Found in Botswana

Alithia Nantege, Africa One News |Business

Saturday, October 25, 2025 at 11:43:00 AM UTC

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A 374 carat natural diamond from Botswana Karowe mine credit wanling tan Gemological Institute of America. Picture Courtesy

In a dazzling revelation from the heart of Africa’s diamond-rich terrain, Botswana has unveiled a geological marvel: the largest known half-pink, half-colorless diamond ever discovered. Unearthed at the renowned Karowe mine, the extraordinary gem weighs an impressive 37.41 carats and exhibits a striking natural duality, one half a vivid pink, the other a pristine colorless. Measuring approximately 24.3 by 16 by 14.5 millimeters, the diamond’s sharply divided hues have captivated gemologists and collectors alike, not only for their rarity but also for the scientific intrigue they present.

Experts from the Gemological Institute of America (GIA) have hailed the diamond as a once-in-a-lifetime find, noting that its unique coloration likely stems from two distinct geological events. The pink half is believed to have formed first, its hue the result of intense pressure and plastic deformation during ancient tectonic activity, such as mountain-building processes. The colorless half, by contrast, appears to have crystallized later under different conditions, making the stone a rare testament to the Earth’s dynamic interior over millions of years. The clean boundary between the two color zones adds to its mystique, suggesting a complex and prolonged formation history that defies conventional gemstone development.

Pink diamonds are among the rarest and most coveted in the world, often commanding astronomical prices at auction due to their scarcity and allure. The discovery of such a large and visually arresting specimen not only enhances Botswana’s reputation as a global leader in diamond production but also underscores the country’s geological richness and mining expertise. The Karowe mine, operated by Lucara Diamond Corp., has previously yielded several record-breaking stones, but this latest find stands out for its combination of size, clarity, and chromatic distinction.

Beyond its commercial value, the diamond holds immense scientific significance. Researchers are eager to study its internal structure and growth patterns, which could offer new insights into the geological processes that create colored diamonds. For Botswana, the discovery is a source of national pride and a reminder of the country’s pivotal role in the global gemstone industry. As the diamond prepares for its journey from mine to market, it is already being hailed as a symbol of natural wonder and a potential centerpiece for collectors, museums, or high jewelry houses seeking a truly singular treasure.

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