Jung's own most sustained engagement with making and transformation is in his study of alchemy, above all Psychology and Alchemy (1944), where he argued that the alchemists were projecting the process of psychic transformation onto their materials, and that the stages of the alchemical work, the nigredo, albedo and rubedo, correspond to stages of individuation. That is a genuine and heavily documented piece of Jungian scholarship, and it is what stands behind the Magician and the Creator in the popular scheme, at some remove. Whether Jung's reading of the alchemical corpus is historically sound is disputed by historians of science, who point out that the alchemists had chemical aims and a technical literature of their own; the atlas records alchemy in its own section, where the operations and stages are described in their own terms.
Jung's alchemical studies were not conducted in isolation: his correspondence and collaboration with the physicist Wolfgang Pauli, a Nobel laureate troubled by his own dreams, ran for over two decades and was substantially published, notably in the joint volume The Interpretation of Nature and the Psyche (1955, with Pauli's own essay on Kepler), material that fed directly into Jung's thinking on alchemical symbolism and his separately developed concept of synchronicity, meaningful acausal coincidence. The Pauli material is one of the more unusual documented intersections between twentieth-century theoretical physics and depth psychology, and it sits well outside anything the popular twelve-archetype literature engages with directly.
Sources Psychology and AlchemyC.G. Jung with Synchronicity: An Acausal Connecting PrincipleC. G. Jung