Porous mineral surfaces and satin metal receive light in different ways. One breaks it into its grain; the other carries a continuous reflection. Their meeting can bring depth to a detail without excessive decoration.
The combination begins with samples viewed together under the light of their intended setting. Tone, texture, brushing direction and joints matter as much as the materials themselves. A carefully drawn boundary lets each surface retain its identity.
The final choice also needs to consider touch, cleaning, exposure and maintenance. No single finish suits every situation. Looking at a detail in context helps balance its visual expression with its care over time.