The Seven Stages of the Great Work

Look up the stages of alchemy today and a clean list of seven comes back: calcination, dissolution, separation, conjunction, fermentation, distillation, coagulation. It is elegant, easy to memorize, and not something any historical alchemist would have recognized as the standard recipe.

There was no standard recipe. The real history of the Great Work is a long argument about how many steps it takes to make the philosopher's stone, conducted by people who agreed on almost nothing except that the answer was a secret.

The oldest map is made of colors

Before anyone counted operations, they watched for colors. The earliest scheme for the Great Work has four phases, each named for what the material in the vessel was supposed to look like: nigredo, the blackening; albedo, the whitening; citrinitas, the yellowing; and rubedo, the reddening. The Greek names are older still: melanosis, leucosis, xanthosis and iosis.

This sequence goes back to the beginnings of the art in Greek-speaking Egypt. It appears in the Physika kai Mystika attributed to Pseudo-Democritus, often counted among the oldest alchemical books, and Zosimos of Panopolis credits knowledge of the stages to an even earlier figure, Mary the Jewess.

The logic was partly chemical and partly symbolic. Black meant the killing, or mortification, of the starting matter. White meant purification. Red meant success. As the alchemist Thomas Norton put it, "Red is the last work in Alkimy."

Even this simplest scheme did not hold still. After the 15th century many writers folded the yellow stage into the red and spoke of only three colors.

Then the counting began

Colors describe what the work looks like. They do not say what to do. For that, alchemists listed operations, and here the tradition splinters.

The best-known list is George Ripley's. His Compound of Alchymy, completed in 1471, lays out the work as twelve "gates" to be passed through in order: calcination, solution, separation, conjunction, putrefaction, congelation, cibation, sublimation, fermentation, exaltation, multiplication and projection. The last is the moment the finished stone is cast onto base metal.

Ripley's gates became a touchstone for English alchemy. Two centuries later Isaac Newton was still working through them: one of his manuscripts now at Cambridge, catalogued as "Ripley expounded," is a commentary on all twelve.