This should be one of the main theories of urban political economy.
At present, the amount of diamond mining in the world is decreasing year by year, while people's pursuit of good things is increasing year by year. Therefore, at present, the price increase of diamonds will continue.
Of course, the price increase or value preservation mentioned here definitely does not refer to those diamonds with a score below 50, or diamonds with average or poor color, clarity and cut.
Because diamonds are not the main investment varieties in the international futures market (after all, resources are limited), stocks cannot rise and gold cannot fall; Stocks fell and gold rose. This simple inference can only be based on people's needs in the market. The simplest example is the surge in the number of marriages in 2006 and 2007, which led to a considerable increase in the price of diamonds compared with the same period in previous years. This explains all the problems.