Albedo (alchemy)

In alchemy, albedo is one of the four major stages of the magnum opus; along with nigredo, citrinitas and rubedo. It is a Latinicized term meaning "whiteness". Following the chaos or massa confusa of the nigredo stage, the alchemist undertakes a purification in albedo, which is literally referred to as ablutio – the washing away of impurities. In this process, the subject is divided into two opposing principles to be later coagulated to form a unity of opposites or coincidentia oppositorum during rubedo.