Precious Stones: Sapphire
Source: TTT
Exodus 24:10
and they saw the God of Israel. Under His feet was a work like a pavement made of sapphire, as clear as the sky itself.
Ezekiel 1:26
Above the expanse over their heads was the likeness of a throne with the appearance of sapphire, and on the throne high above was a figure like that of a man.