3 similar in appearance to a stone, jasper and carnelian, and there was a rainbow around the throne, similar in appearance to an emerald.
Bible verses about "rainbows" | WPNT
Revelation 4:3
Revelation 10:1
1 (I saw a mighty angel descending out of heaven, clothed with a cloud, and a rainbow on his head; his face was like the sun and his feet like pillars of fire;