1) Igneous rock 
Tezontle (tezontle) is a porous, extrusive, igneous, volcanic rock used extensively in construction in Mexico. It is usually reddish in color. ==Composition== Chemically, tezontle is an iron oxide. ==Uses== Tezontle can be mixed with concrete to form lightweight concrete blocks, or mixed with cement to create stucco finishes. Tezontle is often use...