Improving the pricing transparency of polished diamonds is the first part of the two main components of the Crystal Clear philosophy. The other part, driven by the first, is the ability to then determine the prices of rough diamonds.
The rationale that Ehud used here was that, ultimately, it is consumers who determine the price of a rough diamond based on how much they are willing to pay for its polished output.
"I've always felt that the only way to determine the value of rough diamonds is by the value of the polished diamond outcome from that rough diamond, minus the manufacturing costs and profit. Why start from the price of polished diamonds? Because the power to set the price of polished diamonds is in the hands of consumers. The average price consumers pay for a particular polished diamond sets its value."