New Revised Standard Version
and in front of the throne there is something like a sea of glass, like crystal. Around the throne, and on each side of the throne, are four living creatures, full of eyes in front and behind:

Contemporary English Version
Also in front of the throne was something that looked like a glass sea, clear as crystal. Around the throne in the center were four living creatures covered front and back with eyes.

New American Bible
In front of the throne was something that resembled a sea of glass like crystal. In the center and around the throne, there were four living creatures covered with eyes in front and in back.

Douay-Rheims Bible
And in the sight of the throne was, as it were, a sea of glass like to crystal: and in the midst of the throne, and round about the throne, were four living creatures, full of eyes before and behind.

And in the sight of the throne was, as it were, a sea of glass like to crystal: and in the midst of the throne, and round about the throne, were four living creatures, full of eyes before and behind.

a sea.

Revelation 15:2 And I saw as it were a sea of glass mingled with fire: and them that had overcome the beast and his image and the number of his name, standing on the sea of glass, having the harps of God:

Exodus 38:8 He made also the laver of brass, with the foot thereof, of the mirrors of the women that watched at the door of the tabernacle.

1 Kings 7:23 He made also a molten sea, of ten cubits, from brim to brim, round all about; the height of it was five cubits, and a line of thirty cubits compassed it round about.

crystal.

Revelation 21:11 Having the glory of God, and the light thereof was like to a precious stone, as to the jasper stone even as crystal.

Revelation 22:1 And he shewed me a river of water of life, clear as crystal, proceeding from the throne of God and of the Lamb.

Job 28:17 Gold or crystal cannot equal it, neither shall any vessels of gold be changed for it.

Ezekiel 1:22 And over the heads of the living creatures was the likeness of the firmament, the appearance of crystal terrible to behold, and stretched out over their heads above.

the midst.

Revelation 5:6 And I saw: and behold in the midst of the throne and of the four living creatures and in the midst of the ancients, a Lamb standing, as it were slain, having seven horns and seven eyes: which are the seven Spirits of God, sent forth into all the earth.

Revelation 7:17 For the Lamb, which is in the midst of the throne, shall rule them and shall lead them to the fountains of the waters of life: and God shall wipe away all tears from their eyes.

Ezekiel 1:4,5 And I saw, and behold a whirlwind came out of the north: and a great cloud, and a fire infolding it, and brightness was about it: and out of the midst thereof, that is, out of the midst of the fire, as it were the resemblance of amber: . . .

four beasts.

Revelation 4:8,9 And the four living creatures had each of them six wings: and round about and within they are full of eyes. And they rested not day and night, saying: Holy, Holy, Holy, Lord God Almighty, who was and who is and who is to come. . . .

Revelation 5:6,14 And I saw: and behold in the midst of the throne and of the four living creatures and in the midst of the ancients, a Lamb standing, as it were slain, having seven horns and seven eyes: which are the seven Spirits of God, sent forth into all the earth. . . .

Revelation 6:1 And I saw that the Lamb had opened one of the seven seals: and I heard one of the four living creatures, as it were the voice of thunder, saying: Come and see.

Revelation 7:11 And all the angels stood round about the throne and the ancients and the four living creatures. And they fell down before the throne upon their faces and adored God,

Revelation 14:3 And they sung as it were a new canticle, before the throne and before the four living creatures and the ancients: and no man could say the canticle, but those hundred forty-four thousand who were purchased from the earth.

Revelation 15:7 And one of the four living creatures gave to the seven angels seven golden vials, full of the wrath of God, who liveth for ever and ever.

Revelation 19:4 And the four and twenty ancients and the four living creatures fell down and adored God that sitteth upon the throne, saying: Amen. Alleluia.

Ezekiel 1:5 And in the midst thereof the likeness of four living creatures: and this was their appearance: there was the likeness of a man in them.

*etc:

Ezekiel 10:14 And every one had four faces: one face was the face of a cherub, and the second face, the face of a man: and in the third was the face of a lion: and in the fourth the face of an eagle.

full.

Revelation 4:8 And the four living creatures had each of them six wings: and round about and within they are full of eyes. And they rested not day and night, saying: Holy, Holy, Holy, Lord God Almighty, who was and who is and who is to come.

Ezekiel 1:18 The wheels had also a size, and a height, and a dreadful appearance: and the whole body was full of eyes round about all the four.

Ezekiel 10:12 And their whole body, and their necks, and their hands, and their wings, and the circles were full of eyes, round about the four wheels.