'The walls of the White House are this "stone", a type of sedimentary rock, that has been painted over'
sandstone
THE WHITE HOUSE: The walls of the White House are this stone, a type of sedimentary rock, that has been painted over
The walls of the White House are this "stone", a type of sedimentary rock, that has been painted over
The walls of the White House are this "stone", a type of sedimentary rock, that has been painted over
THE WHITE HOUSE
sandstone
THE WHITE HOUSE