Revelation 21:18

"And the building of the wall of it was of jasper: and the city was pure gold, like unto clear glass."

Cross References (ranked by relevance)

Having the glory of God: and her light was like unto a stone most precious, even like a jasper stone, clear as crystal;

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 21:19

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;