A 3,106-carat rough diamond was unearthed at the Premier Mine near Pretoria in January 1905, the largest gem-quality diamond ever recovered. It was later cut into nine major stones, including the Great Star of Africa, now set in the British Crown Jewels.
Record no. MRB-2026-005659
Largest Gem-Quality Rough Diamond Ever Found
Reference Record – Not Certified
This record is compiled from publicly available sources for reference. It has not been examined or certified by The Book of World Records.