Non-metallic materials can appear shiny if their surfaces are polished or coated with thin layers of plastic, wax, or other materials that create a shiny finish.
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How can non-metallic materials appear shiny?
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Non-metallic materials can appear shiny if they have smooth, polished surfaces that reflect light effectively. For instance, polished glass, certain plastics, and glossy ceramics can exhibit a shiny, lustrous appearance despite lacking metallic properties.