To be fair, I wouldn't mind storing my wealth in diamonds and rubies and silver, either. The problem with the stones is that the price is artificially kept high. The mark-up on jewelry is ridiculous. And of course diamond mining is an effective monopoly. So you pay what DeBeers wants you to pay - which is too much. But short of them dumping loads of diamonds and flooding the market, diamonds could be a fair way to store wealth as well. The problem with diamonds though is you either get a whole diamond or you don't. Gold can be cut up, shaved, powdered, and a precise weight handed over. Silver and aluminum are far too common. Although silver has also been a store of wealth, its value is always less than gold. And platinum is just too rare.