'Crystal' in the Bible

“No mention of coral and crystal can be made;For the possession of wisdom is even above [that of] rubies or pearls.

Now stretched over the heads of the living beings there was something like an expanse, looking like the terrible and awesome shimmer of icy crystal.

and in front of the throne there was something like a sea or large expanse of glass, like [the clearest] crystal. In the center and around the throne were four living creatures who were full of eyes in front and behind [seeing everything and knowing everything that is around them].

having God’s glory [filled with His radiant light]. The brilliance of it resembled a rare and very precious jewel, like jasper, shining and clear as crystal.

Then the angel showed me a river of the water of life, clear as crystal, flowing from the throne of God and of the Lamb (Christ),