Knowledge Base

These articles explain diamond optics, cut and grading. They describe the diamond, not the Cutwise interface.

• Optical Performance Evaluation

  Fire, brilliance and symmetry, measured from captured video rather than judged by eye.

• Diamond Cutting Styles & Shapes

  How shape and facet pattern change what a diamond does with light.

• Ray Path in Round Diamond

  How pavilion angle moves the ray path, and what that does to a round's performance.

• Sweet Line in Round Diamonds

  The proportion combinations that keep a round bright across lighting conditions.

• Apparent Size

  Why two diamonds of the same weight look different in size, and how spread measures it.

• Added-Value Diamonds

  Why two diamonds with the same 4C grades can face up differently.

• Live Comparison in DiBox JD

  Fire and scintillation of two cuts side by side, and what size does to fire.

For how to use Cutwise screens and services, see the Documentation.