And the twelve gates were twelve pearls, each of the gates made of a single pearl, and the street of the city was pure gold, transparent as glass. – Revelation 21:21

“Each of the gates of the city is a single, almost 1,400 mile-high pearl. Even as earthly pearls are formed in response to the wounding of an oysters flesh, so these gigantic, supernatural pearls will remind saints throughout eternity of the magnitude of Christ’s suffering and its eternal benefit.” – MacArthur