The Cullinan Diamond is 3,106,75 carats (621.35 grams) diamond and is the largest rough gem quality diamond ever found in the world. After polished it become Cullinan I or Star Africa first and at 530.2 carats (106.0 grams) is the largest diamond in the world until 1985 with the Golden Jubilee of 545.67 carats (109.13 grams) from the same premier Mine.

most expensive diamond the cullinan diamond