Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

What are the HCA (Holloway Cut Advisor) and GIA Cut Estimators?

April 26, 2017advisor cut estimators gia HCA holloway

0

0 Posted

What are the HCA (Holloway Cut Advisor) and GIA Cut Estimators?

1 Answer

0

0 Posted

These online computerized estimators predict performance for a diamond when proportions are plugged in. In 2001 Australian geologist Garry Holloway introduced the HCA which gained great popularity on the internet. The GIA cut estimator is based on a similar principal. The GIA cut estimator uses a scale of 5 levels. The top grade, “Excellent,” overlaps several AGS grades. This wider range allows for configurations farther away from Tolkowsky’s and a broader range of taste. The other grades in GIA’s system are Very Good, Good, Fair and Poor. The Holloway Cut Advisor is a discriminating tool and will identify those diamonds predicted to be highly beautiful (the top 5% of known performers). It is a useful tool for rejection, but should not be used to select one good diamond over another. The best use of HCA is a final check on your selection to ensure it is a good performer.