Within the depth-psychology corpus, turquoise occupies a liminal but recurring position at the intersection of mineral symbolism, sacred cosmology, and color psychology. The term surfaces most explicitly in Jung’s alchemical writings, where it appears in index entries alongside the ‘turquoise goddess’ — a figure associated with Dea Natura and the matriarchal feminine principle — situating the stone within the broader alchemical scheme of color transformation and archetypal femininity. In Campbell’s mythological surveys, turquoise enters as a sacred material substance in indigenous American creation rituals, aggregated with pollen, jet, opal, and abalone to constitute the very body of the first human being, marking it as a cosmogonic element charged with generative power. Neumann’s Great Mother analysis includes turquoise within a dense symbolic index of feminine tree-symbolism, linking it to vegetal and matriarchal iconography. The Daoist scholarship of Kohn situates it geographically and mythologically in the Queen Mother of the West’s Turquoise Pond, a locus of transcendence. Hillman’s extensive treatment of alchemical color in Alchemical Psychology, while focused primarily on blue, provides the theoretical frame within which turquoise — as a blue-green mineral — participates: the blue-green spectrum carries soul-depth, imaginal vitality, and the liminal transit between nigredo and albedo. The term thus condenses mythological, alchemical, and archetypal registers into a single chromatic-mineral node.