Rubedo

Rubedo is a Latin word meaning "redness" that was adopted by alchemists to define the fourth and final major stage in their magnum opus.

[1] Both gold and the philosopher's stone were associated with the color red, as rubedo signaled alchemical success, and the end of the great work.

[3] Some sources describe the alchemical process as three-phased with citrinitas serving as mere extension and takes place between albedo and rubedo.

[4] The rubedo stage entails the attempt of the alchemist to integrate the psychospiritual outcomes of the process into a coherent sense of self before its re-entry to the world.

[5] The stage can take some time or years to complete due to the required synthesis and substantiation of insights and experiences.