קרח . This word is translated "crystal" in Ezekiel 1:22; and "frost," Genesis 31:40; Job 37:10; Jeremiah 36:30; and "ice," Job 6:16; Job 38:29; Psalms 147:17; κρυσταλλος , Revelation 4:6; Revelation 22:1 . Crystal is supposed to have its name from its resemblance to ice.
The Greek word, κρυσταλλος , is formed from κρυος , ice, and σταλασσομαι , to concrete. The word, זכוכית , is translated crystal, in Job 28:17 . Dr. Good observes, "We are not certain of the exact signification, farther than that it denotes some perfectly transparent and hyaline gem."