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Holloway Cut Adviser (HCA)

Pass or fail

The HCA gives a pass or fail score to diamond brightness potential, based on 5 critical details.

Used to assess: Brightness forecast.

Not useful for: Contrast, dispersion, scintillation or diamond-specific assessment.

How does it work?

Go to: Holloway Cut Adviser (HCA)

Enter the details requested and hit “go”. The HCA creates an imagined "chalk outline" of the diamond's basic external shape and calculates whether its angles are working together in a way that's likely to have strong brightness (light entering the crown will return to the viewer’s eye) or undesirable leakage (light entering the crown is lost through the bottom of the diamond's bottom). The page returns with an estimated Total Visual Performance score as well as well as other generalized estimates.

What am I looking for?

A Total Visual Performance grade of Excellent. This will be a score between 0.1 and 1.9: Scores under 2 are all considered equally positive, meaning 0.1 is not preferable to 1.9, and vice-versa.


Scores below 2 are indicative of complimentary angle combinations for abundant brightness. Scores higher than 2 indicate geometry where some of the light entering the crown is predicted to exit through the diamond’s bottom (leakage), creating darkness.

What are the benefits?

The concept is based on geometry, refractive index and physics so it’s reliable. The HCA is excellent for the stated purpose of weeding out round diamonds which will have undesirable leakage.


  • The HCA is not diamond-specific so Fire, Scintillation and Spread estimates are meaningless for diamonds with Infinity's focused crafting goals.
  • The creator is constantly reminding users the HCA is a tool for rejection, not selection: If the score is higher than 2.0, reject the diamond and move on. If the score is lower than 2.0 the diamond shows promise and more information is needed. All scores under 2 are considered to have equal performance potential.
From Garry Holloway

Remember my Cut Adviser is a rejection tool to weed out potentially poor performing diamonds. 

Viewing in-person recommended 

Most people, even professionals, have never experienced the fire, sparkle and life of Crafted by Infinity Diamonds. The astonishing edge to edge brightness, bigger bolder bursts of fire, crisper "on-off" scintillation and superior sparkle are scientific realities, fine-tuned in a private channel by Paul Slegers and his team. Exceeding all laboratory metrics, Crafted by Infinity is far ahead of the industry. It’s why leaders in the scientific and diamond grading communities have chosen Infinity for their loved ones. Be sure to view them with your own eyes. They must be seen to be believed.

Use the infinity viewer

Come see technical cut-quality views for yourself in any of the fine showrooms where Crafted by Infinity is sold. The Infinity Viewer includes a licensed AGS ASET scope, along with a Hearts & Arrows Optical Precision scope, joined on a combined platform. This device permits you to appreciate the exquisite cut of your Crafted by Infinity diamond in full depth and detail with your own eyes.

Technology is too limited to demonstrate those differences online. Find a showroom near you, or bring a Crafted by Infinity Diamond directly to your home for viewing with the High Performance Diamonds Cut Quality Kit.

Visit any Crafted by Infinity showroom to see technical cut quality elements live, in full depth and detail.

See in your home

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