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 ...

Recent research suggests that injecting solid particles into the atmosphere may significantly mitigate stratospheric warming, ...

He covers the scarcity and value of diamonds and uncut gems, and he describes how thieves value sets and engravings. Since leaving prison, Sobolewski gained a bachelor's degree in psychology.