Most bricks are made from clay.
the mineral is clay and there is no rock
A brick is not a rock. It is a building material made out of baked clay.
Armadillo
If a brick is made from a natural occurring matter such as chiseling a stone into the shape of a brick, then maybe. If it is clay/mudd that is heated into the shape of a brick, then maybe not
Because metamorphic rock is smaller than brick
Rock Brick
Although they usually traces of metals--like iron--in the clay they're made fro brick are not made of metal. However as bricks are not composed of any single element but of compounds, they cannot properly be called nonmetals.
Clay and Rock
As hard as a brick
pyramids were usually made of bricks, sandstone, or even sometimes stone weighing 2.5 tons!
The tower was built with limestone and lime mortar, with marble used inside.
It is made of hard roasted lime brick blocks of rock and stones and other rocks and mineral type of things.