Opus alchymicum

Opus alchymicum, or opus, sometimes called the “work,” is theĀ alchemicalĀ process of transmuting cheaper metals into more precious ones.

Initially the opus alchymicum had four stages: the nigredo(black), the albedo(white/silver), the citrinitas (yellow), and theĀ rubedoĀ (red/gold).

After the fifteenth century references to the citrinitas stage were gradually phased out leaving the opus alchymicum with three main stages.Ā A.G.H


Sources:

Drury, Nevil. “Opus, Stages of the”Ā The Watkins Dictionary of Magic. London. Watkins Publishing. 2005. pp. 218-219