Clay is made up of clay minerals, and clay minerals are chemically weathered from minerals such mica and felspar.

Clay Target throwers are used in trap shooting to throw the clay targets. The clay traps (clay pigeons) are then shot for practice or for sport. It is very difficult to toss clay targets far enough by hand so the throwers are needed.

Clay is not a property, but a natural material.

clay and solid rock has porosity

Clay and loam are both commonly placed on the bottom of ponds.