Rough diamonds make no mention of cutting. Cut according to 3EX, the approximate price is 2w8-3w.

In September, the price of platinum in Beijing 18K was per gram 186, which was roughly equivalent to 2 10-230 yuan per gram.

This is the cost. If you buy a finished ring, the general brand should be multiplied by 1.5-3.5, which is more reasonable. If it is a big brand, the coefficient will be higher.