 In addition to the structural use of limestone, much of their mortar consisted of crushed, burnt, and mixed limestone that mimicked the properties of cement and was used just as widely for stucco finishing as it was for mortar.However, later improvements in quarrying techniques reduced the necessity for this limestone-stucco as their stones began to fit quite perfectly, yet it remained a crucial element in some post and lintel roofs.A common building material in central Mexico was tezontle (a light, volcanic rock).