Parallel
Revelation 21:18
Patriarchal Greek New Testament (1904) · Berean Standard Bible
καὶ ἦν ἡ ἐνδόμησις τοῦ τείχους αὐτῆς ἴασπις, καὶ ἡ πόλις χρυσίον καθαρόν, ὅμοιον ὑάλῳ καθαρῷ.
The wall was made of jasper, and the city itself of pure gold, as pure as glass.