Do glossy tiles have to be porcelain?

Both ceramic and porcelain are available with a high reflection. Glazed ceramics and porcelains are referred to as gloss while full-bodied or double-loaded porcelains are referred to as polished. The name for the type of reflection indicates the method by which it is achieved.

“Gloss” refers to the type of glaze used. “Polished” refers to the mechanical polishing process which occurs after the tile is manufactured.