Jawaban:

There are several ways to separate two solid materials, one of which is shiny and the other is dull. One common way to do this is to use a sifter or sieve with a mesh size that is small enough to allow the dull material to pass through while retaining the shiny material. The sifter is shaken over a collection tray or container to allow the dull material to fall through while the shiny material remains on top. Another method is to use a magnetic separation process if one of the materials is magnetic and the other is not.