LINK VIDEO: Contraluz - (the contraluz effect occurs when the light is inserted inside or laterally) pieces with contraluz effect are rare. Natural opal rough Ethiopian Welo Untreated! Beautiful Color Multicolor flash fire 1 piece Size: 40 x 21 x 13 mm about 10.9 grams - 54.5 cts Photo with lamp light condition! beautiful colors also sunlight! Wet Piece - Photo wet piece Keep moist The properties of Opal bring joy and a sense of happiness, increase the joy of living, stimulate artistic creativity and imagination. please be careful with the description and measures Standard shipping ( 2-7 days for Italy ) ( 10-20 days for Europe ) ( 15-45 days for rest of the world )