'Rock' in the Bible

"As you were watching, a rock was quarried but not with human hands and it struck the iron and clay feet of the statue, breaking them to pieces.

Then the iron, the clay, the bronze, the silver, and the gold were broken in pieces together and became like chaff from a summer threshing floor that the breeze carries away without leaving a trace. Then the rock that struck the statue grew into a huge mountain and filled the entire earth.