Revelation 4:6
And before the throne was a sea of glass, like crystal: and in the middle of the throne, and the circle of it, were four animate beings full of eyes before and behind.
Revelation 4:3
And He that sat upon it, was to look at like a jasper and a sardine stone, and there was a rainbow round the throne like the appearance of an emerald.
Revelation 21:11
and her light was like a most precious stone, even as a Jasper-stone resembling crystal:
Treasury of Scripture Knowledge
Summary
And the likeness of the firmament upon the heads of the living creature was as the colour of the terrible crystal, stretched forth over their heads above.
The likeness
Bible References
The likeness
Revelation 4:3
And He that sat upon it, was to look at like a jasper and a sardine stone, and there was a rainbow round the throne like the appearance of an emerald.
Revelation 21:11
and her light was like a most precious stone, even as a Jasper-stone resembling crystal: