e've all heard of the song "Diamonds Are a Girl's Best Friend," but it seems diamonds are also becoming an investor's best friend.
Rough diamond prices have jumped nearly a third since 2005 and are likely to rise another 20 percent by 2017, bolstered by demand in Asian economic powerhouses China and India, according to wealth research firm Wealth-X.
Record prices of these baubles have been making headlines lately. A pear-shaped 101.73 carat "flawless" diamond, for example, sold for a record $27 million to luxury jeweler Harry Winston at a Christie's auction in Geneva.
It's no surprise that many investors want in on the action.
According to net worth data provided by Wealth-X, as of July 15, 2013, the world's richest diamond owners consist of collectors, dealers, business owners as well as investors who have stakes in some of the world's biggest diamond mines.
Some of the individuals on our list are also known to own some of the rarest and most expensive diamonds ever found.
So, who are the world's top 10 billionaire diamond owners? Click ahead to find out. By Rajeshni Naidu-Ghelani