21 The twelve gates were twelve pearls. Each one of the gates was made of one pearl. The street of the city was pure gold, like transparent glass.
Revelation 21:21 Cross References - WEB
1 Kings 6:20
20 Within the inner sanctuary was twenty cubits in length, and twenty cubits in width, and twenty cubits in its height; and he overlaid it with pure gold; and he covered the altar with cedar.
Isaiah 60:17-18
17 For bronze I will bring gold; for iron I will bring silver; for wood, bronze, and for stones, iron. I will also make peace your governor, and righteousness your ruler.
18 Violence shall no more be heard in your land, nor desolation or destruction within your borders; but you will call your walls Salvation, and your gates Praise.
Matthew 13:45-46
Revelation 17:4
4 The woman was dressed in purple and scarlet, and decked with gold and precious stones and pearls, having in her hand a golden cup full of abominations and the impurities of the sexual immorality of the earth.
Revelation 18:16
16 saying, ‘Woe, woe, the great city, she who was dressed in fine linen, purple, and scarlet, and decked with gold and precious stones and pearls!
Revelation 21:11-12
Revelation 21:18
18 The construction of its wall was jasper. The city was pure gold, like pure glass.
Revelation 22:2
2 in the middle of its street. On this side of the river and on that was the tree of life, bearing twelve kinds of fruits, yielding its fruit every month. The leaves of the tree were for the healing of the nations.