Actress Mia Farrow and model agent Carole White are set to testify next month over claims that supermodel Naomi Campbell accepted a 'blood diamond' from Charles Taylor.

The women's names are on a witness list for Monday, August 9, that the prosecution in the former Liberian president's war crimes trial filed with the court in The Hague according to court papers.

The prosecution says both women have agreed to testify about the late-night gift allegedly presented to Campbell after a celebrity dinner hosted by then South African president Nelson Mandela in September 1997.

Campbell herself was subpoenaed to testify about the events, after refusing to talk to prosecutors voluntarily, and is due to take the stand in The Hague.

Taylor, 62, has been on trial since 2008 for his alleged role in the civil war in Sierra Leone, accused of arming rebels in return for illegally mined diamonds.

White and Farrow, who were present at Mandela's dinner, claim to have proofs that Campbell was given a diamond by Taylor, reports the Telegraph.

White told prosecutors she was present when the diamond was delivered, while Farrow "was told by Campbell the next morning about the gift".

The prosecution alleges the rough diamond was among those Taylor had obtained from Sierra Leone rebels and took to South Africa "to sell ... or exchange them from weapons". (ANI)