Diamonds according to the ads, they're a girl's best friend

Diamonds according to the ads, they're a girl's best friend, and the only thing worth picking for an engagement ring. But how did diamonds become so important and why?

Not only do they control 80-90% of the worlds diamond mine output, the truth is they maintain the scarcity in order keep the artificial prices high.

Diamonds in general aren’t all that rare, especially when you compare it to gold which is very hard to find and extremely useful.