Revelation 4:3

and they saw the God of Israel; and under His feet there appeared to be a pavement of sapphire, as clear as the sky itself.

In the year of King Uzziah’s death I saw the Lord sitting on a throne, high and lifted up, with the train of His robe filling the temple.

As the appearance of the rainbow in the clouds on a rainy day, so was the appearance of the radiance all around. Such was the appearance of the likeness of the glory of Yahweh. And I saw this, and I fell on my face and heard a sound of a voice speaking.

Then I looked, and behold, in the expanse that was over the heads of the cherubim something like a sapphire stone, in appearance in the likeness of a throne, appeared above them.

Then I saw another strong angel coming down out of heaven, clothed with a cloud, and the rainbow was upon his head, and his face was like the sun, and his feet like pillars of fire;

having the glory of God. Her brilliance was like precious stone, as a stone of crystal-clear jasper.

The foundation stones of the city wall were adorned with every kind of precious stone. The first foundation stone was jasper; the second, sapphire; the third, chalcedony; the fourth, emerald;

the fifth, sardonyx; the sixth, sardius; the seventh, chrysolite; the eighth, beryl; the ninth, topaz; the tenth, chrysoprase; the eleventh, jacinth; the twelfth, amethyst.