The New Jerusalem, a quasi natural-spiritual city that will float down out of the heavens above at the end of the world? A city that is made out of gems and silver and streets of gold?
Well, can I encourage you to rethink that just a bit? Of course there is a heaven if we are talking about "in his presence is fullness of joy and at his right hand are pleasures evermore" (Ps. 16:11). But the New Jerusalem was never about going to heaven. It was simply a synonym for how everyone would belong to the community of the presence of God on earth.