What Determines Diamond Prices? 

When buying a diamond always remember that there are four key factors that determine the value of a Diamond. These factors are collectively known as the four C's. 

Carat
Cut
Color
Clarity

The combination and variables of these factors drive both the value of the diamond and more importantly - they determine the brilliance of the stone. 

There is a direct correlation between the precision of the diamonds clarity, color, cut, and the carat.