1.2.1
Although onyx is occasionally called
travertine, commercial practice generally
distinguishes the two stones because of
obvious differences that relate to their
respective attractiveness. Onyx tends to be
more crystalline, strongly banded and colored
in browns to yellows and clear. It can be
translucent, and light-colored varieties sliced
thin are used for attractive backlit display
panels or even light-admitting windows. By