Revelation 21:18 And the building of the wall of it was of jasper: and the city was pure gold, like unto clear glass.
19 And the foundations of the wall of the city were garnished with all manner of precious stones. The first foundation was jasper; the second, sapphire; the third, a chalcedony; the fourth, an emerald;
20 The fifth, sardonyx; the sixth, sardius; the seventh, chrysolite; the eighth, beryl; the ninth, a topaz; the tenth, a chrysoprasus; the eleventh, a jacinth; the twelfth, an amethyst.
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.
Now we get to see the walls were made of and it was a material called Jasper which is a diamond like stone and the city itself was like unto pure gold like clear glass which will help God’s glory shine throughout the city. Now the foundations were made of different stones, first Jasper = Diamond, second Sapphire = A brilliant blue stone, third Chalcedony = Sky blue with colored stripes, fourth Emerald = Bright green stone, fifth Sardonyx = Red and white striped stone, sixth Sardius = Various shades of Red, seventh Chrysolite = Transparent gold or yellow, eighth Beryl = Shades of green, yellow and blue, ninth Topaz = Yellowish green, tenth Chrysoprasus = Gold tinted green, eleventh Jacinth = Blue or violet colored, twelfth Amethyst = Purple stone. All these stones will help set off a rainbow of beautiful colors because of the brilliant light of God’s glory. Now each gate to the city was one giant pearl, remember the walls are 1500 miles high and the streets were pure gold that were crystal clear. This is a city that the glory of God will shine through at all times and we will walk on streets of pure gold, something that is not even known to man today but the gold we have today is one of the most valuable things to man. To God it is just part of His kingdom because He owns everything. Today we place value on the too many material things and not enough value on spiritual things.