Over the head of the living creature there was the likeness of an expanse, like the awesome crystal to look on, stretched forth over their heads above.

Before the throne was something like a sea of glass, similar to crystal. In the midst of the throne, and around the throne were four living creatures full of eyes before and behind.

having the glory of God. Her light was like a most precious stone, as if it was a jasper stone, clear as crystal;