Berean Standard Bible
Revelation 21:19
“The foundations of the city walls were adorned with every kind of precious stone: The first foundation was jasper, the second sapphire, the third chalcedony, the fourth emerald,”

In context
17And he measured its wall to be 144 cubits, by the human measure the angel was using.
18The wall was made of jasper, and the city itself of pure gold, as pure as glass.
19The foundations of the city walls were adorned with every kind of precious stone: The first foundation was jasper, the second sapphire, the third chalcedony, the fourth emerald,
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Berean Standard Bible · A modern, readable English translation. Public domain (CC0).