Shale can be used as a filler in paints, plastics, and roofing cements, and ground shale can be used as a replacement for clay in the manufacture of bricks.
Shale can be used as a filler in paints, plastics, and roofing cements, and ground shale can be used as a replacement for clay in the manufacture of bricks. It is a sedimentary rock which is grey....
It can be use for jewellery and stone age arrowheads, as the obsidian was much sharper when made into a specific shape. It can be sharpened to a very thin thickness.It is very shiny and is black....