Revelation 21:11

21:11 The city possesses the glory of God; its brilliance is like a precious jewel, like a stone of crystal-clear jasper.

Revelation 22:1

22:1 Then the angel showed me the river of the water of life – water as clear as crystal – pouring out from the throne of God and of the Lamb,

Revelation 4:6

4:6 and in front of the throne was something like a sea of glass, like crystal.

In the middle of the throne and around the throne were four living creatures full of eyes in front and in back.