.90 carat diamond price
First of all, diamonds are all priced per carat. So, lets say a 0.50 carat diamond has a price of $1400 per carat. That diamondâs price for the stone would be $1400 * 0.50, or $700. Secondly, diamond prices per carat increase as you jump up to higher weight categories.Therefore, diamond prices increase exponentially with weight, since their prices increase both due to the increased weight and due to the higher price per carat for the increased weight category.econdly, diamond prices per carat increase as you jump up to higher weight categories. Therefore, diamond prices increase exponentially with weight, since their prices increase both due to the increased weight and due to the higher price per carat for the increased weight category.