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 ...

Diamond prices appear to be stabilizing, largely due to a decline in diamond supply, according to the IDEX Online diamond ...

Fancy colored diamonds, colored gems and signed jewels will be featured at New York auctions from Phillips and Bonhams in ...