Chlorophyll is one of the so-called photosynthetic pigment, and is found in all organisms that perform aerobic photosynthesis: cyanobacteria, plants, and algae. Chlorophyll was discovered in 1817 by Pelletier and Caventou who isolated it from the leaves of plant. The two chemists also isolated other substances that would be used in pharmaceuticals, such as caffeine and quinine. Its chemical structure has of two parts, a poryphin ring with a single magnesium atom in the centre, and a long phytol chain. Chlorophyll is also the generic name for a large number of compounds, including Chlorophylla, which is a microcrystalline pigment with a blue-green colour, and Chlorophyll b, which is green and bright yellow in color. Algae containing chlorophyll often has secondary pigments such as carotenoids and phycobilins, which supply yellow, orange, and reddish tones. In alchemy the color green, in the form green crystals, symbolized the “secret fire” of the living spirit in substances. OLD WOOD presents a green hue with a faint hint of yellow, that is warm, clean, lively, and very transparent. In accordance with the Michel-Eugéne Chevreul chromatic circle, the pigment chlorophyll complements the red pigments that are so profusely used in string instruments, creating harmony in the color tonality.