The type of rock that the White House is made from is a
sedimentary rock called sandstone. The outside walls of the White
House are covered in a mixture of glue sand and rice which is where
it gets its white color from.
Yes, White House (The White House) is a compound noun; a word
made up of two or more words that together form a word with a
meaning of its own. The proper noun 'The White House' is an open
spaced compound noun.
I found on the WWW that it it is made partly from lime stone,
although it says in my earth science text book that the white house
is made out of sand stone, because its easily cut into blocks or