Revelation 21:1-2. And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea. And I John saw the holy city, New Jerusalem, coming down from God out of heaven, prepared as a bride adorned for her husband. Revelation 21:10-11. And he carried me away in the spirit to a great and high mountain, and shewed me that great city, the holy Jerusalem, descending out of heaven from God, Having the glory of God: and her light was like unto a stone most precious, even like a jasper stone, clear as crystal; Revelation 21:12-13. And had a wall great and high, and had twelve gates, and at the gates twelve angels, and names written thereon, which are the names of the twelve tribes of the children of Israel: On the east three gates; on the north three gates; on the south three gates; and on the west three gates. Revelation 21:14. And the wall of the city had twelve foundations, and in them the names of the twelve apostles of the Lamb. Revelation 21:15-16. And he that talked with me had a golden reed to measure the city, and the gates thereof, and the wall thereof. And the city lieth foursquare, and the length is as large as the breadth: and he measured the city with the reed, twelve thousand furlongs. The length and the breadth and the height of it are equal. Revelation 21:17. And he measured the wall thereof, an hundred and forty and four cubits, according to the measure of a man, that is, of the angel. Revelation 21:18. And the building of the wall of it was of jasper: and the city was pure gold, like unto clear glass. Revelation 21:19-20 And the foundations of the wall of the city were garnished with all manner of precious stones. The first foundation was jasper; the second, sapphire; the third, a chalcedony; the fourth, an emerald; the fifth, sardonyx; the sixth, sardius; the seventh, chrysolite; the eighth, beryl; the ninth, a topaz; the tenth, a chrysoprasus; the eleventh, a jacinth; the twelfth, an amethyst. Revelation 21:21. And the twelve gates were twelve pearls; every several gate was of one pearl: and the street of the city was pure gold, as it were transparent glass. Revelation 21:22-23. And I saw no temple therein: for the Lord God Almighty and the Lamb are the temple of it. And the city had no need of the sun, neither of the moon, to shine in it: for the glory of God did lighten it, and the Lamb is the light thereof. Revelation 22:1.And he shewed me a pure river of water of life, clear as crystal, proceeding out of the throne of God and of the Lamb. Revelation 22:2. In the midst of the street of it, and on either side of the river, was there the tree of life, which bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations. Revelation 22:3. And there shall be no more curse: but the throne of God and of the Lamb shall be in it; and his servants shall serve him:

For more details refer to the PDF https://heavenscatalyst.org/truth/revelation-commentary/