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 ...

Desperate times call for desperate measures, an old saying which explains why the world’s diamond ... per carat, a rise attributed to a higher proportion of top value stones whereas the average ...

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