'Crystal' in the Bible

Something like a sea of glass, similar to crystal, was also before the throne. Four living creatures covered with eyes in front and in back were in the middle and around the throne.

arrayed with God’s glory. Her radiance was like a very precious stone, like a jasper stone, bright as crystal.

Then he showed me the river of living water, sparkling like crystal, flowing from the throne of God and of the Lamb