Gina Rinehart has accused her children of not understanding the importance of work or appreciating her efforts to rescue the family company in the final instalment of a two-part Australian Story special on her life.

In her first interview in more than 10 years, the mining magnate touched on the feud between her and her two oldest children, John Hancock and Bianca Rinehart, over a family trust worth an estimated $4 billion.

Mrs Rinehart said her father, Lang Hancock, warned her that she would "rue the day" she took control of her late mother Hope's shares for her children.