Revelation 21:17-21

Then he measured the walls and found them to be 216 feet thick (according to the human standard used by the angel). The wall was made of jasper, and the city was pure gold, as clear as glass. The wall of the city was built on foundation stones inlaid with twelve precious stones: the first was jasper, the second sapphire, the third agate, the fourth emerald, the fifth onyx, the sixth carnelian, the seventh chrysolite, the eighth beryl, the ninth topaz, the tenth chrysoprase, the eleventh jacinth, the twelfth amethyst. The twelve gates were made of pearls—each gate from a single pearl! And the main street was pure gold, as clear as glass.