Largest Rough Diamonds Ever Found

About This Dataset

The largest gem-quality rough diamonds ever recovered, by carat weight. South Africa's 1905 Cullinan remains the biggest at 3,106.75 carats, while a wave of enormous stones from Botswana's Karowe mine now fills most of the rest of the list.

✨ AI Insight

The Cullinan (3,106.75 carats) has stood unbeaten for over a century and still dwarfs the field by more than 600 carats over the 2024 Motswedi (2,492). What stands out is geography and timing: every other stone in the top eight came from Botswana, and five of them were unearthed between 2019 and 2025. That surge reflects modern XRT sorting technology at the Karowe mine, which detects giant crystals before they are shattered by crushing. Below the two multi-thousand-carat leaders the list settles into a 1,098-2,036 carat range, showing that while thousand-carat finds are now almost routine, matching Cullinan's scale remains vanishingly rare.

Source: Wikipedia - List of Largest Rough Diamonds

Key Findings

Auto-computed highlights from this dataset

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Cullinan (South Africa, 1905) leads with 3,107 in All Time.

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Average value in All Time: 1,781 · median: 1,617.

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Gap in All Time: Cullinan (South Africa, 1905) is 2.8× larger than Unnamed 1,098 ct (Botswana, 2021).