Revelation 4:6
And in front of the throne as it seemed, a glassy sea like crystal; and in the midst of the throne and encircling it are four Living Creatures, full of eyes before and behind.
Revelation 4:3
and he who sat was in appearance like a jasper stone and a sardius; and there was a rainbow round about the throne, like an emerald to look upon.
Revelation 21:11
It had the glory of God. Its light was like some precious stone, like jasper, clear as 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 who sat was in appearance like a jasper stone and a sardius; and there was a rainbow round about the throne, like an emerald to look upon.
Revelation 21:11
It had the glory of God. Its light was like some precious stone, like jasper, clear as crystal;