Professor Jose M. Sasian, College of Optical Sciences (University of Arizona) is a published authority on Optical Sciences, and a recipient of numerous awards and honors in the field of optical design, optical fabrication and testing, optical instruments and much more. His research into the Crown of Light Diamond cut and facet plan was documented in his report, The Crown of Light Diamond Cut—a New Paradigm in Light Performance. In it he contrasts the patented Crown of Light facet plan to that of the more well-known Tolkowsky round brilliant diamond cut.

Sasian references the use of the ASET diamond viewing technology which provides scientists with a uniform way of evaluating the effects on brilliance, fire and scintillation depending on the angle of incidence of light entering the stone and that which is reflected back to the viewer’s eye. The detailed observations of his research may be challenging for the layman who lacks in-depth optical science knowledge. But one thing is clear; the ASET images on the well-cut diamond and the Crown of Light diamond gives evidence of the superb light performance in the Crown of Light.

While the Crown of Light diamond was viewed alongside an excellent-cut Tolkowsky diamond, there was a pronounced difference in how a Crown of Light Diamond performed. According to Sasian, “The Tolkowsky round brilliant cut has 57 facets (excluding the culet). In comparison, the Crown of Light cut has 90 facets. The larger number of facets provides more paths for the stone to exhibit brilliance, fire, and scintillation.”

One of the most prominent design aspects of the Crown of Light is its higher dome (than conventional round brilliants) and its smaller table facet. These distinct modifications play a key role in the light performance, concludes Sasian. “The superb light performance of the Crown of light cut at high angular ranges is a trade-off with diffuse brilliance and virtual facet size.” The value of Professor Sasian’s research rests in his objectivity in covering the subject matter. His observations and research lead him to conclude; “An exciting find is that technically the Crown of Light embodies a new paradigm in light performance where the cut is designed for maximum contrast brilliance, fire scintillation, and sparkle.”

You’re encouraged to read through the report’s entirety to appreciate how the examination process works, and how the findings pointed to his conclusions. The report, “The Crown of Light Diamond Cut—a New Paradigm in Light Performance” provides a clearer understanding of the science of optics—and what we can learn from them.


Download the report: The Crown of Light Diamond Cut – A New Paradigm in Light Performance