The first scientific diamond cut quality studies used two dimensional ray trace calculations. Over the last decade 3D studies have evolved, that include viewing and lighting conditions. More recently the OctoNus & MSU group, followed by the American Gem Society Labs, have studied the psycho-physiology of you the observer. "Psycho" relates to how our mind creates perceptions, and "physiology" is about the mechanics of the eyes. This article begins with an explanation of why humans do not "see" like a camera or a light meter, and moves on to consider various aspects of contrast and leakage. It concludes with a discussion of contrast as one piece in the basic light response jig-saw puzzle of an effective cut grading system.

This Power Point presentation discusses how new cuts could help diamond industry profitability and branding problems

• The problem – a lack of differentiation
• Why diamonds have a Branding problem. (What is a brand & diamond’s functional issues)
• Why today's Cut grading leads to commoditization
• The Master Stone Study supervised by OctoNus – a better way
• The development of many new diamond cuts
• New diamond brands, like brands of cars etc

Click the speaker icon in the center of each slide to hear a voice over

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This journal article documents letters to the Editor exchanged between the GIA cut study team and the cut group who wrote an article in The Australian Gemmologist

The original article from Volume 23, Number 1, January – March 2007 is not reprinted here, but a similar article was posted here on this websites on-line Journal.

With kind permission of The Australian Gemmologist

 

Next Diamond™ enables diamonds to be cut and polished in a way that solves problems for diamond cutters, retailers and consumers. Consumers can actually see the shape and quality of the diamond that appeals to them, personally, and the rough diamond will only be cut after being selected as the preferred diamond.

As part of the development of Next Diamond™ and to provide a consistent method to display diamonds from afar, the Cut Group has been working on a lighting box, diamond movement system and camera set ups. We would like to receive your feedback and suggestions for improvements for a standardized lighting box.

The main goal is standardize the lightings and technology for cut comparison on the Internet to give a high level of repeatability.