(2 minutes)

How do I know that a diamond is cut to true ideal 3D proportions and typography? What is the Light Path Scope and how does it work?

How good is this diamond in radiating light?

A properly cut diamond must return all the light it receives through its top in 3 dimensions.

A diamond that does this without any blatant loss through its bottom has ideal proportions. It will be much brighter than a diamond that leaks light out the bottom.