What is the surface of XXX made of?
Taj Mahal
The Taj Mahal (/ˌtɑːdʒ məˈhɑːl/, more often /ˈtɑːʒ/; Persian for ``Crown of Palaces'', pronounced (ˈt̪aːdʒ mɛˈɦɛl)) is an ivory-white marble mausoleum on the south bank of the Yamuna river in the Indian city of Agra.
marble