G5193–ὑάλινος–hualinos

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;

ὑαλίνη, hu'alinē “of glass,”

and I saw as a sea of glass mingled with fire, and those who do gain the victory over the beast, and his image, and his mark, `and' the number of his name, standing by the sea of the glass, having harps of God,

ὑαλίνην hu'alinēn “of glass”ὑαλίνην hu'alinēn “glass”