Let us assume that the actual carats per ton went up because of the difference between the two sieve rates which is approximately 20% . This assumption means we are producing 20% more of the finer diamonds. The finer diamonds have been selling at about 8 dollars US per carat. Look what happens to our actual carat value when you remove the smaller diamonds. 

Actual 

sale         Number of carats           revenue                  average value per carat.

1                  351,000                 27,379,000                                78

2                  177,000                 25,134,000                              142

3                  451,000                 26,669,000                                59

4                  350,000                 28,350,000                                 81

5                  356,000                 30,260,000                                 85

6                  334751                  22,093,566                                 66


total           2,099,751             159,824,566                                 79.13 average


Now lets look at if it was done with a 1.5 sieve as in the study and we remove the 20% smaller diamonds at 8 dollars US per carat.

sale         Number of carats           revenue                  average value per carat.

1                280,800                 26,816,400                               95.5

2                141,600                 24,850,800                              175.5

3                300,800                 25,887,400                                71.75

4                280,000                 27,700,000                                99.25

5                284,400                 29,690,400                                104.25

6                267,800                 21,557,964                                 80.5

total         1,615,800              159,824,566                                96.91

So that is a difference of 403,950 carats  for a revenue of $3,231,601. I have discussed this in the past with some board members and asked if it was worth going after those smaller diamonds because at some point there is what they call a point of dimishing return. I was informed that it would be the same cost and that we would be missing the additional revenue.