??? Mystery Rock ???
-Most of the time pyrophyllite is in a massive form as a constituent of slate and other metamorphic rocks.
Igneous Rock
-Basaltic- This rock is used everytime when you drive on the roads. Also whenever you go into a building you're going in to basaltic rock.
Sedimentary Rock
-Sandstone- This is another kind of rock that is used in the building of houses.
Metamorphic Rock
-Slate- This is used for roofs. So basically again, walking into a house or buliding you would be using slate.