Holloway Cut Advisor Earns US Patent

diamond engagement rings hcaThe United States’ Patent & Trademark Office issued patent No. 7,251,619 on July 31 to Garry Holloway of Canterbury, Australia, inventor of the Holloway Cut Advisor (HCA) system, for a computer implemented method for evaluating the Cut Quality of a loose diamond.

Holloway is a frequent contributor to diamond discussion forum, where he is being congratulated on this accomplishment.

The HCA (loose diamond cut advisor) has become a popular tool for enabling consumers to quickly sift through thousands of round brilliant shape diamonds to determine their Cut Quality.

One of the reasons this tool has been embraced, is because of it’s ease in comparing many diamonds with only the limited basic information and deriving an instant result for the diamonds score.

The following measurements are plugged into the HCA formula:
Depth %
Table%
Crown angle
Pavillion angle

These measurements are obtained either from the Diamond Lab Grading report or from either a Sarin or Megascope Proportion Analyzer.

A diamond is scored on a scale of 0-10 with the following breakdown:
0-2 Excellent, 2-4 Very Good, 4-6 Good, 6-8 Fair, and 8-10 Poor.
Proportion Results of a Round Brilliand Diamond by Megascope Proportion Analyzer.

In its capacity as a “filter tool” for loose diamonds, the Holloway Cut Advisor is useful and as a reject rather than a pick tool.

It is within this context, that the few Internet companies who showcase diamonds with comprehensive information and data, will encourage the use of the HCA as a means of consumer empowerment for rejecting underachieving diamonds.

However, the reality is that just like many scientific tools and metrics, the HCA does indeed have its limitations.

For example, it only takes into account and measures 17 facets of a loose (round) diamonds’ 58 facets; all of which are crucial to the diamonds face up appearance and resultant light performance.

Anatomy of a Round Brilliant Shape Diamond: To maximize a diamond’s sparkle, all 58 facets are critically important and have to be correctly aligned and cut to proper size and angles.

Therefore, many industry experts and diamond gemologists have cautioned consumers against using the HCA as the sole determining factor (and exclusively) as a means of actually selecting an expensive diamond, instead of where it best serves the consumer, as a rejection tool and when used in tandem with other established scientific diamond (cut precision) measuring devices and light performance tools.

Overall, the HCA empowers Consumers by providing the diamond shopper with a useful tool in rejecting diamonds of mediocre to poor Cut Quality and Mr. Holloway deserves credit for helping consumers with their decision making process.