Revelation 4:3 Meaning: What the Jasper, Sardius, and Rainbow Reveal

The Greek word for jasper (iaspis) could describe a stone that was translucent, sometimes green but often sparkling white or purple. In the ancient world it was one of the most precious gems, set in the high priest’s breastplate and later in the foundation of the New Jerusalem. The sardius (sardion) was a fiery red stone, like a carnelian. Many early readers saw in these two stones the brightness of God’s purity and the fire of His justice. But John does not leave us there. The rainbow (iris) appears around the throne, and it looks like an emerald, a rich green that rests the eye. That colour calls to mind the covenant God made with Noah: the promise never to destroy the earth by flood again. The jasper and sardius speak of who God is in Himself, holy and just. The emerald rainbow speaks of what He has promised, mercy that holds even His throne together.

Christians across the centuries have seen different layers in these stones. Some, like John Wesley, read the white of the jasper as God’s purity and the red of the sardius as the justice that would fall on His enemies. Others, like the Geneva Bible notes, focus on the rainbow as the sign of God’s covenant faithfulness. The Cambridge Bible points out that the rainbow forms a complete circle, not a half-arch, a picture of God’s eternal perfection. Matthew Henry and others connect the stones to the high priest’s breastplate, reminding us that God’s glory and mercy were foreshadowed in the temple. All traditions agree that John is not describing God’s literal form; he is showing us what it means to stand before the Holy One who keeps His promises.

Some readers imagine that John is describing God’s physical face or body, as if the Almighty looked like a human covered in gems. In fact, as Adam Clarke and others note, the description aims at the surrounding glory and splendour, not the person’s shape. John uses the best words he has, jewels and a rainbow, to convey an experience that words cannot hold. The point is not what God looks like, but that He is holy, just, and faithful to His covenant.

This week, you might feel small or afraid when you think of God’s holiness. The jasper and sardius can feel too bright to look at. But the rainbow is still there. It rings the throne completely. That emerald colour says: His mercy is not an afterthought. It surrounds everything He does. When you pray, when you worry about the future, when you remember a promise you made to God and wonder if He will keep His, picture that rainbow. The One who sits on the throne is both holy and faithful. You can trust Him.