The wall was built of jasper, while the city was pure gold, like clear glass.
We have already considered the introduction to the vision of the new Jerusalem in a more general idea of the heavenly state; we now come to the vision itself, where observe, I. The person that opened the vision to the apostle - one of the seven angels, that had the seven vials full of the seven last plagues, Rev 21:9.
Commenting on Revelation 21:9-27
And the building of the wall of it was of jasper,.... Which is expressive of the impregnableness, duration, brightness, and glory of salvation by Christ, the jasper being a very hard, durable, and bright stone; and salvation can never be made void, and of none effect; it will last for ever, and in this state will come forth as light, and as a lamp that...
Verse 18. And the building of the wall of it. The material of which the wall was composed. This means the wall above the foundation, for that was composed of twelve rows of precious stones, . The height of the foundation is not stated, but the entire wall above was composed of jasper. Was of jasper. .