5. Georgina Rinehart

•  Net Worth: $17 B                                                                      
•  Source of Wealth: mining
•  Citizen: Australia
•  Age: 59

Richest person in the country of Australia, Gina Rinehart ranks fifth in this list. She is the daughter of late Lang Hancock who was a mining tycoon. She inherited the business from her father and took it to new heights which is reflected in her net worth. According to Forbes, her net worth stands at Eighteen Billion US Dollars. Her major source of wealth is from mining and hence she is some times also called as ‘Mining Billionaire’. She ranks #35 in the list of most powerful women in the world.