The enchanting sound of this wind chime is the result of a special tuning using the "Golden Ratio." This ratio, discovered by the ancient Greeks, can be found throughout nature. It takes the soft, sticky, natural resin of conifers millions of years to harden into an organic gemstone. Amber can vary from clear to opaque and comes in a variety of colors, as well as the soft golden color that are used in this windchime. In ancient times, amber was known as the "tears of the sun."