In Grant Mooney’s series, Cation c. (i-vi), various impressions of an early technology deployed in small-scale metallurgy are cast in silver. This method uses found cuttlebone to form molten silver topologies which sit amid steel channels, electroplated with silver to varied degrees. As particles migrate with an electrical current to form new layers on steel surfaces, “material disputes” between ferrous (containing iron) and non-ferrous compounds, occur as the surface becomes volatile in the moment of contact with air. Encouraged to oxidate and bind with free particles, each piece's coloration evolves from silver to amber over time, based on contingent interactions with the gallery environment and the viewers within.