This is an artwork that represents a black moon in a happy background, like a universe full of color and happiness that reminds you to a world of Arabic and Mozarabic moons. The green color in contrast with the black is so intense that it gives the power to this image. This black moon in reality is the emitted fluorescence by a longitudinal cut of a grape after the diode laser irradiation in the blue spectrum. The different parts of the vegetal tissue (xylem, phloem…et cetera) cause the various rings around the grape.