Marshall H. Saville, Turquois mosaic art in ancient Mexico (1922)
“ In the lapidarian art they had advanced so far as to fashion and adorn many objects with designs, both geometric and realistic, in stone mosaic, employing turquois chiefly for this purpose, but also making use of other stones—marcasite and shell. But the supreme esthetic achievement of the Aztecs was the production of a class of mosaics in which they used tiny bits of colored feathers instead of stones in making the designs. ”
