Back to today’s briefing

Story perspectives

Today in History: Cullinan Diamond: Largest Gem-Quality Diamond Discovered

1/26/2026

50 4

Summary

Story summary

On January 26, 1905, the Cullinan Diamond, weighing 3,106 carats, was discovered at the Premier Mine in Gauteng, South Africa. This gem-quality diamond remains the largest ever found. Initially unsold for two years, it was later purchased by the Transvaal Colony government and presented to King Edward VII in 1907.

1 of 1

Story summary

On January 26, 1905, the Cullinan Diamond, weighing 3,106 carats, was discovered at the Premier Mine in Gauteng, South Africa. This gem-quality diamond remains the largest ever found. Initially unsold for two years, it was later purchased by the Transvaal Colony government and presented to King Edward VII in 1907.