the square of the weight is multiplied by the price of a single carat; so that, for example, a rough stone of three carats costs 3x3x 2 or 18. It is similar with : cut diamonds, and in 1850 the ...

The diamond price is to blame, driven by falling demand in, you guessed it, China. Diamond prices have dropped about 12% over the last five years. Here's the Idex diamond benchmark over the last ...