Using waste cement products, this paper speculates on how the process of chalk extraction may be reversed to create new architectures for extractive chalk landscapes. Building on the role of chalk extraction in the cement industry, this architecture is to be precipitated from water infused with waste products, slowly growing to produce a new architectural language. Components are tested using material analog physical modeling alongside 3D scanning and digital modeling. The key outcome of this research is the development of a propositional slowly-grown stone architectural system, with the methodology of physical modeling allowing the grown stone system to be developed in detail at an architectural scale, starting with simulations of cave formations before testing drip edges, ending with architectural elements including a window frame and ceiling vault.