When Danny Archer arrives in South Africa, there are two women standing in front of the airport and he walks by them. These women are Leonardo DiCaprio's mother and grandmother.
De Beers Group, which is the largest player in the diamond trade, has expressed reservations that the film will reduce public demand for diamonds. De Beers maintains the trade in conflict diamonds has been reduced from 4% to 1% by the Kimberley Process and it has been suggested the company pushed for the film to contain a disclaimer saying the events are fictional and in the past. De Beers has denied this.
Danny Archer has a tattoo of an African buffalo with two crossed arrows on his shoulder, this is the unit emblem of 32 Battalion sometimes called the "Buffalo Battalion".
Solomon's son's name is Dia, which means "expensive" in Krio, the adapted language of Sierra Leone.