A roof tile is made of baked clay.

屋顶的瓦是用黏土烧制而成的。

youdao

The building product may be a concrete roof tile formed by a roller and slipper extrusion method, a clay tile made by pressing in a clay tile press, or a cast concrete roof tile.

该建筑制品可以是由轧辊和滑块挤压法形成的混凝土屋面瓦，在泥质瓦挤压机中挤压制成的泥质瓦，或者浇铸而成的混凝土屋面瓦。

youdao

Hawkins paces out just one square foot of foreshore and picks up Victorian plate, modern glass, oyster shell, medieval roof tile, granite ballast from merchant ships and clay pipe stems.

BBC: London from the tide line