Ezekiel 1:22

Now [the] likeness above the heads of the living creatures [was] an expanse like the outward appearance of {awesome} {ice} spread out above their heads {upward}.

Ezekiel 10:1

And I looked, and look! On the expanse that [was] above the head of the cherubim [something] like a stone of sapphire, [and] like [the] appearance of [the] shape of a throne it appeared above them.

Ezekiel 1:26

And from above the expanse that [was] above their heads [there was] the likeness of a throne, {looking like a sapphire}, and above the likeness of the throne [was] a likeness similar to [the] appearance of a human on it, [but] {above it}.

Revelation 4:6

And before the throne [was something] like a sea of glass, like crystal, and in the midst of the throne and around the throne [were] four living creatures full of eyes in front and in back.

Exodus 24:10

And they saw the God of Israel, and [what was] under his feet [was] like sapphire tile work and like the very heavens for clearness.

Job 37:22

From [the] north comes gold-- awesome majesty [is] around God.

Revelation 4:3

And the one seated [was] similar in appearance to jasper and carnelian stone, and a rainbow [was] around the throne similar in appearance to emerald.

Revelation 21:11

that has the glory of God. Its radiance [is] like a precious stone, [something] like a jasper stone, shining like 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.

Bible References

The likeness

Ezekiel 1:26
And from above the expanse that [was] above their heads [there was] the likeness of a throne, {looking like a sapphire}, and above the likeness of the throne [was] a likeness similar to [the] appearance of a human on it, [but] {above it}.
Ezekiel 10:1
And I looked, and look! On the expanse that [was] above the head of the cherubim [something] like a stone of sapphire, [and] like [the] appearance of [the] shape of a throne it appeared above them.
Exodus 24:10
And they saw the God of Israel, and [what was] under his feet [was] like sapphire tile work and like the very heavens for clearness.
Job 37:22
From [the] north comes gold-- awesome majesty [is] around God.
Revelation 4:3
And the one seated [was] similar in appearance to jasper and carnelian stone, and a rainbow [was] around the throne similar in appearance to emerald.
Revelation 21:11
that has the glory of God. Its radiance [is] like a precious stone, [something] like a jasper stone, shining like crystal.