A large stone, maybe a carat ... But the hard truth is that years after the term blood diamond breached the public consciousness, there is almost no way to know for sure that you’re buying ...

this West African country endured a bloody civil war that left more than 70,000 people dead and displaced 2.6 million others—funded largely through the trade of so-called blood diamonds.

Even celebrities see the appeal: in December, Blood Diamond star Leonardo DiCaprio ... "He got a higher-quality stone for ...