It's the mastermind of the deBeer's diamond cartel. They did a number on the population by going after women.
By making women think that the only way a man can prove his love for her is by buying her a diamond, they assure continual sales of their products. These days, it's just the little girls who fall for it, but since the little girls have so much influence over the little boys, ....the cycle is complete.
Plus too, if it's a good investment grade diamond, it truly can be a girl's best friend.