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The Firescope As Cutting Tool
The Firescope became a cutting tool because no diamond could measure up to its scrutiny.
The instrument was developed for Takanori Tamura, a Japanese businessman turned diamond dealer. Convinced of the possibility of 100 percent light return, Tamura went on a buying trip using the Firescope to find perfect diamonds.
His days were constant disappointment - until he found three tiny stones that showed no light leakage. They also exhibited a distinctive eight-rayed pattern - though no one could explain why.
Tamura returned to Japan and hired a master cutter, Kioyishi Higuchi, to unlock the secret of this pattern. It took Higuchi more than a year, and countless diamonds, but he used the Firescope to analyze the symmetry of every facet - creating what is now the EightStar cut.
Many scopes have been developed over the years to show off a particular diamond pattern. But in this case, the Firescope came first. The EightStar cut was created to answer the instrument's exacting objective standards.
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