Exodus 24:10
10 and they fsaw the God of Israel. There was under his feet as it were a pavement of gsapphire stone, like the very heaven for clearness.
Ezekiel 1:26
26 And above the expanse over their heads there was tthe likeness of a throne, tin appearance ulike sapphire;1 and seated above the likeness of a throne was va likeness with a human appearance.
Ezekiel 10:1
The Glory of the Lord Leaves the Temple
1 Then I looked, and behold, xon the expanse that was over the heads of the cherubim there appeared above them something ylike a sapphire,1 in appearance like a throne.