Revelation 4:3
And he that sat was to look on like a jasper and a sardine stone: and there was a rainbow round about the throne, in sight like to an emerald.
Nave's Topical Index—AKJV

Revelation 10:1
And I saw another mighty angel come down from heaven, clothed with a cloud: and a rainbow was on his head, and his face was as it were the sun, and his feet as pillars of fire:
Nave's Topical Index—AKJV