 The cut
The cut of the 
diamond allows natural light to enter into the heart of the 
stone and reflect back, which gives the 
diamond its original brilliance and fire. To put it otherwise, the sparkle of the
 stone depends more upon 
the cut quality of the 
diamond than on its 
color grade. Yet again, a 
D stone will emit maximum luster and radiance when compared to an 
H stone.
 
The 
GIA diamonds in the 
color range D to Z, but there are naturally colored 
diamonds too, which do not fall under this grading. Take, for instance, a blue 
diamond; its natural blue hues will surely affect how amazing the centerpiece looks in an 
engagement ring, but even more, if it were cut in a perfect 
heart shape.
Although some would say that 
cut quality matters a lot more than 
color to get the

 best light performance from a 
diamond, it actually depends upon the preferences of the customer to evaluate 
cut and color when it comes to buying a 
diamond ring.