Were twelve pearls. See Barnes on "Re 17:4; Mt 13:46".

Every several gate was of one pearl. Each gate. Of course, this is not to be understood literally. The idea is that of ornament and beauty, and nothing could give a more striking view of the magnificence of the future abode of the saints.

And the street of the city was pure gold. Was paved with gold; that is, all the vacant space that was not occupied with buildings was of pure gold. See Barnes on "Re 21:18".