Alchemical Psychology names the disciplinary project of reading the symbolic corpus of Western alchemy as a sustained, if largely unconscious, phenomenology of psychic transformation. The depth-psychology corpus treats the term across a spectrum of positions, from Jung’s foundational claim that alchemy provided an objective, historical substrate for his psychology of the unconscious, through Hillman’s post-Jungian recovery of alchemical language as a living therapeutic and imaginal idiom, to Edinger’s careful mapping of specific operations—calcinatio, solutio, coagulatio—onto concrete clinical material, and finally to Giegerich’s stringent critique that Jung and Hillman alike failed to let alchemy’s logical form genuinely transform the structure of psychology itself, treating it instead as illustrative content while preserving a modernist subject-object epistemology. Von Franz contributes the genealogical argument that depth psychology is a late descendant of the alchemical spirit, concerned with the same animating unknown the alchemists projected into matter. Moore, following Ficino, presents alchemical consciousness as a cultivable attitude that keeps soul from literalism. What unites these voices, despite their tensions, is the conviction that alchemical imagery is not merely antiquarian but provides the deepest available symbolic language for processes of psychic separation, conjunction, and transformation that remain clinically and culturally urgent.