Richard Branson said Nelson Mandela's private burial was the "closure of the most incredible life".
The entrepreneur said heads of state were "wiping their eyes" during the ceremony.
Zulu warriors gathered on a hill above Nelson Mandela's burial site to say a final goodbye to South Africa's first black president.
Local television showed the anti-apartheid leader's coffin at the family grave site, but stopped broadcasting the event before the coffin was lowered at the request of the Mandela family.
Military helicopters with South Africa flags flew over Nelson Mandela's grave in Qunu moments before the former South African president was laid to rest.
The country's first black president was buried following a large funeral service which was attended by over 4,000 guests.
The body of Nelson Mandela has been buried in a grave near his ancestral village of Qunu in South Africa's Eastern Cape province.
The burial attended by family members and South African leaders followed a state funeral service and closed 10 days of mourning for the former president and anti-apartheid leader.
Uniformed bearers have carried Nelson Mandela's coffin from the funeral ceremony to the burial site.
A smaller group of guests will now pay tribute to the former South African president at the private hillside ceremony.
South Africa has said its final farewell to Nelson Mandela, the man who reconciled the country in its most vulnerable period.Read the full story ›
As the funeral procession moves to Nelson Mandela's final resting place, mourners tell of how the former South African president's legacy will "live on".
#MandelaFuneral A send off befitting a Hero, our father, our role model, my inspiration to be a better person each day.
Desmond Tutu is among those walking to Mandela's grave site now. Yesterday he said he wouldn't be coming
Nelson Mandela's coffin has been escorted by military personnel to the burial site.
The former South African president will now be buried in a private hillside ceremony following the conclusion of the two-hour service.
As the service to farewell Nelson Mandela approaches its end, South Africans join together to say goodbye to their former leader.
President #Mandela personified great leadership, humility and strength all in 1. You will be sorely missed. Long Live Madiba!