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.
KJV
And they saw the God of Israel: and [there was] under his feet as it were a paved work of a sapphire stone, and as it were the body of heaven in [his] clearness.
ASV
and they saw the God of Israel; and there was under his feet as it were a paved work of sapphire stone, and as it were the very heaven for clearness.