'Glass' in the Bible

and in front of the throne was something like a sea of glass, like crystal. In the middle of the throne and around the throne were four living creatures full of eyes in front and in back.

Then I saw something like a sea of glass mixed with fire, and those who had conquered the beast and his image and the number of his name. They were standing by the sea of glass, holding harps given to them by God.

The city's wall is made of jasper and the city is pure gold, like transparent glass.

And the twelve gates are twelve pearls -- each one of the gates is made from just one pearl! The main street of the city is pure gold, like transparent glass.