Holloway Cut Adviser

The Holloway Cut Adviser (U.S. Patent 7,251,619) is a rejection tool to help you narrow your search for only round diamonds potential Light Return, Fire, Scintillation and Spread based (only) on the proportion information from a grading report. HCA does not use symmetry, polish and minor facets info.

When you have narrowed your search to a few candidates I suggest you request Ideal-Scope images, or buy your own Ideal-scope from my company

Click for the Ideal-scope reference chart

You can post photos on the RockyTalky forum for opinions and advice. Alternatively employ an independent appraisers.

Scores of 0-1 are usually not best for rings. Most people prefer stones that score 1-2, or even top Hearts & Arrows symmetry stones up to 3.0. Zero is almost impossible since many performance factors conflict.

Crown % and Pavilion %'s are less accurate than angles.

Good luck finding a sparkly diamond.
Garry Holloway FGAA, Dip diamond Technology.

The tutorial explains more about Cut and diamond beauty. A detailed description of HCA is available at