King James Version
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.English Standard Version
Over the heads of the living creatures there was the likeness of an expanse, shining like awe-inspiring crystal, spread out above their heads.Catholic Public Domain Version
And above the heads of the living creatures was the likeness of a firmament: similar to crystal, but dreadful to behold, and extending over their heads from above