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 ...

Prices for the rarest stones from Rio Tinto’s defunct Australian mine have long outperformed mainstream investments ...

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

Natural light streams in from a wall-to-wall window where Eric, a diamond cutter (whose surname must remain a secret), is preparing a 782-carat rough diamond the size of a baseball to be sliced by an ...

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 ...

The 300-carat necklace thought to be at the center of the infamous 'Affair of the Diamond Necklace' that contributed to the ...