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.
BSB · Berean Standard Bible
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.
KJV · King James Version
They saw the God of Israel. Under his feet was like a paved work of sapphire stone, like the skies for clearness.

Note or, lapis lazuli

WEB · World English Bible
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.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

saw
Exodus 24:10; Exodus 3:6; Exodus 33:20, 23; Genesis 32:30; Judges 13:21, 22; 1 Kings 22:19; Isaiah 6:1–5; Ezekiel 1:28; John 1:18; John 14:9; 1 Timothy 6:16; 1 John 4:12
of a sapphire stone
The Hebrew {sappir,} is without doubt the sapphire; which is a most beautiful precious stone of a fine blue colour, second only to the diamond in lustre, hardness, and value. The ancient oriental sapphire is supposed to have been the same as the lapis lazuli. It glitters with golden spots; and is of an azure or sky-blue colour, but rarely intermixed with purple. The ruby and topaz are considered of the same genus.
Ezekiel 1:26, 27; Ezekiel 10:1; Revelation 4:3; Revelation 21:19–23
in his clearness
Song of Songs 6:10; Matthew 17:2; Revelation 1:16; Revelation 21:11, 18