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Charm-The Fifth C?(Charm Index is a technology to measure optical properties of a diamond's brilliance )(Brief article)
By Gary Roskin, G.G., FGA
Scientists from the Scientific & Research Institute of Experimental Physics lab at the Russian Federal Nuclear Center, along with directors from Kristall Production Corp., diamond manufacturer in Smolensk, Russia, say they've developed a machine that can measure a diamond's charm.
According to the Smolensk Gemological Center, the Charm Index is defined 'on the basis of measured optical properties of a diamond's brilliance that can be perceived by an observer's eye.' After measuring a polished diamond's optical properties, technicians use a set of defined mathematical formulas to determine a number between zero and 10-the brilliance beauty index. That number represents a diamond's 'charm.'
Optical properties that are reportedly measured are brightness (or brilliance intensity), dispersion (or fire), ...
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