Read "Production and Revenue from a Large Diamond Mine" page 5 of developed by Mines and Mineral information center titled "Drift Prospecting for Diamonds"
Here are the results based on they methodology of calculations.
I am not trying to say that this will be the price but just show the range of potential SP and possibility. Nobody knows now the cost per tonne or price per carat.
But i am confident that your number does now consider PE ratio, the cost, price per carat.
