Firmament: רָקִ֖יעַ – Raqia
And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters.( Genesis 1:6 ) KJV
And I saw as it were a sea of glass mingled with fire: and them that had gotten the victory over the beast, and over his image, and over his mark, and over the number of his name, stand on the sea of glass, having the harps of God.( Revelation 15:2 ) KJV
Accepting the firmament as a sphere of rigid crystal on the edge of space solves scriptural and physical problems. The King James Bible is the only one from which an accurate cosmological model may be deduced.