Glass

“Neither gold nor crystal can compare to it, nor jewels of fine gold be exchanged for it.”

“The wall was made of jasper, and the city itself of pure gold, as pure as glass.”

“And the twelve gates were twelve pearls, with each gate consisting of a single pearl. The main street of the city was pure gold, as clear as glass.”

“And I saw something like a sea of glass mixed with fire, beside which stood those who had conquered the beast and its image and the number of its name. They were holding harps from God,”