An article of jewelry arranged to simulate natural optical effects, such as sparkle and scintillation, is described. The article comprises a jewel, such as a brilliant cut diamond and one or more light sources, such as colored LEDs, incorporated in the article of jewelry for emitting light so as to illuminate...http://www.google.es/patents/US6433483?utm_source=gb-gplus-sharePatente US6433483 - Jewellery illumination
