This is a recent diamond education video I made to highlight the difference between the Cut quality of these 3 diamonds. I specifically selected these 3 diamonds that have almost identical GIA certificates. They all have the same grades. To a layman, these 3 diamonds are pretty much the same, but somehow perform very differently.
This video proves that you should never buy a diamond just based on the GIA certificate alone. There are many factors the GIA certificate doesn't reveal such as the light performance of the diamond.
Check out this video to find out more!