Actually, Diamonds are the worst case of monopoly. The de Beers company bought ALL diamond mines and despite the diamond being common af, they only dispatched a diminute amount of them compared to their actual capacity in order to lower the offer. Then they did MARKETING, LOTS OF IT. The "Diamonds are Forever" movie is one of the examples, another example is the "2 months of salary" rule which was made up in a commercial, and PLENTY of marketing to make it the rule at weddings. All this marketing increased the demand so much and since they where the only offer, THEY put the price. As logical, the price skyrocketed and that is the reason behind the price of diamonds. F you de Beers