Are ceramics natural or man made?

Answer 1

The clear glass that we find in windows and use in the kitchen is man made and so it is artificial.

It is typically made from silica, sodium oxide and lime, but there are many variations.

Technically, the term glass has a special meaning in science.

Glass, as a generic form of matter, is a form of amorphous solid and many materials form this state of matter naturally.

Answer 2

Clay is a naturally occurring substance. Shaping it and firing it to make the shape permanent is a human activity. You decide whether you would describe it as natural or manmade!