The Rinehart legal tussle rages on as two of Gina Rinehart's children continue the mudslinging that started last week, with the latest rants provided by John Langley Hancock, who accused his mother of setting off the dispute.

In a statement first reported by The Sunday Herald, Hancock claimed that Rinehart, recently listed by Forbes as the richest person in Asia and Australia with an estimated net worth of $US18 billion, sparked the family feud by working to control the $5 billion trust fund that was set up in 1988 by the family patriarch, Lang Hancock.

Hancock, however, thwarted his mother efforts and along with two of his sisters - Bianca Hope Rinehart and Hope Rinehart-Welker - had lodged legal petitions for the elder Rinehart to be removed as trustee of the huge fund.

Instead, the younger Rineharts asked the court to give them full control of the fund, triggering a very public battle that positioned the siblings against their mother, who had inherited her wealth but also worked hard to increase her net worth via skilful investments on iron ore ventures in Western Australia.

John Hancock said in his statement that his mother had cut him off financially but thankfully his own works has earned for him sufficient provisions to support his family.

"I'd love to have inherited projects and royalties to work with ... instead I've got to rely on the skills I possess in economics and business management," Hancock said.

He added that Rinehart had stopped extending financial support to him since September last year but in the process that episode afforded him the chance to earn $122,000.

Hancock also directed scathing remarks to his younger sister, Ginia Rinehart, who refused to join the petition that would have allowed the Rinehart siblings to gain full control of the multi-billion fund that was originally set up by their grandfather.

"I won't be able to replicate my youngest sister Ginia in 'earning' the achievement of a Rolls Royce at 25 but at 36, I'm now using my set of skills to earn enough for my family and to help several very interesting projects achieve commercialisation," Hancock was reported by BusinessDay as saying on Monday.

Earlier, Ginia had accused her siblings of greed and expressed regret that the family name had been dragged in a public controversy that should have been settled privately.

"This case is motivated entirely by greed and I have no doubt that one day soon my brother and sisters will regret putting money before family," Ginia said in a statement she issued on Saturday.

She added that it was lamentable that the rest of the Rinehart family had failed to appreciate Gina Rinehart as "a loving and hard-working mother (who) has only ever wanted the best for her children,"

Ginia told BusinessDay that her sibling should have opted to fix the family matter quietly and prevent the public from feasting on the case, which she described as "nothing but a destructive display of greed, jealousy and a selfish sense of entitlement."

"Whatever their reasons, what my siblings are doing to my mother is unjustified ... This is a private family matter that my siblings should never have dragged us all through publicly," Ginia said in her latest statement.

A separate statement issued by Rinehart's lawyer, Paul McCann, had indicated that Australia's richest woman was greatly distressed by the public pronouncements of her children.

"In addition to the trust and through the use of Mrs Rinehart's own personal assets, all of Mrs Rinehart's children have been provided with every personal and financial advantage, and Mrs Rinehart is disappointed that John Hancock has chosen to assert otherwise," the official statement was reported by The Australian as saying on Monday.

"The plaintiff children have seen fit not to follow sound advice from family friends that if they are not happy they should go out and earn for themselves," the statement added.

On Friday last week, the Australian High Court turned down pleadings by Rinehart's lawyers to suppress the details of the case, opening the door for the public to get a closer glimpse on the unfolding controversies besetting the richest family in the country.