GemNotes

The '60/60’ Diamond Certificate High-tech advancements such as the Gemological Visualization System from Diamond Technologies in Georgia, the Fire-Scope in Japan and the Sarin in Israel can measure every angle, percentage and millimeter of a diamond. Some even claim to measure symmetry, brilliance and dispersion. Yet the industry still can’t agree just which proportions, brilliance, dispersion reading or angles give diamond its greatest beauty. Many swear by Tolkowsky’s original proportions. Yet how many retail jewelers or diamond manufacturers actually carry diamonds with 53% tables? (Remember that Tolkowsky did not give a range for table size, nor did he include any girdle thickness measurement.) And new studies of brilliance, dispersion and symmetry question even Tolkowsky’s numbers. Despite all this high-tech analysis aimed at finding the perfect proportions, many diamo
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