Separation
Zodiacal correspondence (Pernety, 1758): Scorpio ♏
Separation is the dividing of a mixed substance into its distinct components, parting the pure from the impure and the subtle from the gross. It underlies many other operations and is closely tied to the spagyric motto 'separate, and join together again.' Pernety assigns it to Scorpio, and Ripley made 'elemental separation' his third gate. In practice it embraced filtration, decantation, the collecting of distilled fractions, and the parting of metals in assaying.
Historical Development
Separation is the operation of division: parting a body into its constituents so that the pure may be retained and the impure discarded. It is foundational to the spagyric program associated with Paracelsian medicine, whose very name was glossed from Greek roots meaning to separate and to recombine. Separation thus sat at the heart of an analytical impulse that ran through alchemy.
Pernety keys separation to Scorpio; Ripley had made 'our elemental separation' his third gate. In assaying, separation corresponds to the parting of gold and silver by acids or cementation, a precise and economically vital procedure that connected alchemical theory to the work of mints and metallurgists.
Textual Tradition
Separation pervades the corpus and is treated by the Paracelsians as the key to isolating the active virtues of substances for medicine. Stanton Linden's anthology gathers many texts in which separation carries both technical and allegorical meaning.
Modern Scholarship
Scholars of Paracelsian and spagyric medicine, including Wouter Hanegraaff and William Newman, situate separation within the broader analytical project that later informed chemical analysis proper. They stress that the operation's spiritual readings coexisted with, rather than replaced, its hands-on laboratory use.