Crystal

Job 28:17; Ezekiel 1:22; Revelation 4:6; Revelation 22:1
1. zekukith (Job 28:1717The gold and the crystal cannot equal it: and the exchange of it shall not be for jewels of fine gold. (Job 28:17)), probably glass highly ornamented, such as was made in Egypt: it is here classed with gold; but wisdom, the gift of God, far exceeds such things in value.
2. gerach, ice, and so frequently translated. The firmament over the living creature was “as the color of the terrible crystal” (Ezek. 1:2222And the likeness of the firmament upon the heads of the living creature was as the color of the terrible crystal, stretched forth over their heads above. (Ezekiel 1:22)).
3. κρύσταλλος. John saw a sea of glass like unto crystal (Rev. 4:66And before the throne there was a sea of glass like unto crystal: and in the midst of the throne, and round about the throne, were four beasts full of eyes before and behind. (Revelation 4:6)); the water of life and the jasper stone were seen “clear as crystal” (Rev. 22:11And he showed me a pure river of water of life, clear as crystal, proceeding out of the throne of God and of the Lamb. (Revelation 22:1)). The ancient glass may have been “clear” in the sense of not having spots and blemishes, without its being wholly transparent.