My contribution and what have leant so far on the above topic.
Revelation 21:21 And the twelve gates were twelve pearls: every several gate was of one pearl: and the street of the city was pure gold, as it were transparent glass.
Some people think that the new Jerusalem is already in Lake City or Missouri will have a second think now that the kingdom of heaven we are talking about here is not made by hand, and also in the above bible passage tells us that the street and gate are made of pearls.
According to reaserch, the largest Pearl was found in the Palawan Sea by Filipino diver in 1934. It was believed that the peals was 600 years old and it weighed 14 pounds, 9 and a half inches in diameter, and its valued $42,000,000. If that should available to man, how much more our God that owns the whole universe will use, He will use the best of all for the new Jerusalem He has promised us. The Lord will give us understanding of His word the more in Jesus name. Thank you.
You can watch my video bellow.
You can watch Bro Eli's video bellow for more understanding.