Diamonds in the rough: De Beers on spotting the fakes among the flawless and why their synthetic gems are becoming much more attractive
![Diamonds in the rough: De Beers on spotting the fakes among the flawless and why their synthetic gems are becoming much more attractive](http://i.dailymail.co.uk/i/pix/2015/12/21/21/06E9D41C00000514-0-image-a-6_1450733143235.jpg)
Mention diamonds and many may happily conjure up an image of Marilyn Monroe performing Diamonds Are A Girl’s Best Friend in the 1953 movie Gentlemen Prefer Blondes.