Kyocera Corp announced that its "recrystallized ruby" was employed by the "MR-G," the highest-class model of the Casio Computer Co Ltd's G-Shock impact-resistant wrist watch.
The recrystallized ruby is used for the ring-shaped part inside the watch. The part is made by cutting out a ring with a diameter of about 3cm from a rough recrystallized ruby (4.85 carats, about 0.97g).
Kyocera developed a recrystallized ruby in 1975 by using its proprietary gem synthesis and crystallization technologies. It is an artificial gem whose composition is the same as that of a natural gem. It features a brilliant color and can easily be cut into any size and shape because of its toughness. Currently, the company is selling 14 kinds of recrystallized gems including an emerald and a ruby.
There are not many natural gems from which the MR-G's part can be cut out, Kyocera said. The MR-G will be released in the summer of 2010 in Japan.
Thus far, Kyocera has been selling its recrystallized gems mainly for use in jewelry goods. But it began to develop ornamental gems for electronic devices in earnest in the fall of 2009.

July 2010
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