The Cullinan Diamond
The Cullinan Diamond is the largest gem-quality rough diamond ever found, weighing 3,106.75 carats, discovered in 1905 in South Africa and cut into multiple gems now owned by the British Crown Jewels.
Estimated value as of 2026 · Source: Multiple sources including 1stdibs, masinadiamonds, and nazarsandco
Fun Fact
The original Cullinan was gifted to King Edward VII but purchased by the Transvaal government at a reported price of £150,000, though its true value was estimated much higher even then.
Price History
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