'Crystal' in the Bible

and before the throne is a sea of glass like to crystal, and in the midst of the throne, and round the throne, are four living creatures, full of eyes before and behind;

having the glory of God, and her light is like a stone most precious, as a jasper stone clear as crystal,

And he shewed me a pure river of water of life, bright as crystal, going forth out of the throne of God and of the Lamb: