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