The span of my materials

Materials that are hard and those that are soft
Materials that are mundane and those that are rare
Materials that are shiny and those that are dull
Materials that are heavy and those that are light
Materials that are resistant and those that are vulnerable
Materials that are conductive and those that are insulating
Materials that are organic and those that are artificial
Materials that are surprising and those that are ordinary
Materials that are compounds and those that are mixtures
Materials that are melted and those that are hardened
Materials that are smooth and those that are rough
Materials that are static and those that change
Materials that are benign and those that are toxic
Materials that are autobiographical and those that are collective
Materials that are local and those that are foreign
Materials that are physical and those that are spiritual …