This article presents and discusses alchemy and cybernetics as fields in interaction through a conversation model. The starting point for establishing this relationship is the distinction between communication and conversation as pointed out by authors such as Gordon Pask, Ranulph Glanville and Vilém Flusser. Alchemy was the field of knowledge that best managed to unify Europe’s technological, philosophical and mystical world-view in the late Middle Ages. From an experimental basis, alchemy dealt with the transformation processes mirrored both in a particular (...) understanding of the dynamics of nature as in the connection between man and universe. Cybernetics, like alchemy, was a field developed from an interdisciplinary view of knowledge associated with a particular historical context, being, since its origin, the field that relates and operationalizes complexity and unpredictability in mechanical, biological and social systems. Cybernetics and alchemy are, from a constructivist perspective, models for structuring the world and collective systems of communication within cultural processes. Both are taken here as co-participants in an elliptical dialogue based on three main concepts: distinction, dialogue and emergence. The elliptical conversation model can be understood as a map of the complexity of the interactive field that is established between alchemy and cybernetics, generating a new entity while encapsulating two others, it is the distinction that accommodates two others, a dialogue between black boxes. (shrink)