¹⁷ And my guide measured the wall; it was nearly 72 yards high, in human measurements, which was the instrument the guide was using. ¹⁸ The wall was made of jasper, while the city itself was made of pure gold, yet it was as clear as glass. ¹⁹ The foundation stones of the wall of the city were decorated with every kind of jewel: the first was jasper, the second sapphire, the third agate, the fourth emerald,