| 摘要 |
PROBLEM TO BE SOLVED: To provide a jewel with a water clear diamond which is changed to a blue fluorescent colored diamond as the fluorescent diamond is irradiated with blue light of LED of specific wavelength. SOLUTION: In a jewel 1, a fluorescent diamond 3 is irradiated with blue light of LED 4 of 400-410 nm wavelength, then, the water clear diamond is changed to a blue fluorescent colored diamond. COPYRIGHT: (C)2006,JPO&NCIPI
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