Glass, Glassy - Vine's Expository Dictionary of New Testament Words
Glass, Glassy[ A-1,Noun,G5194, hualos ]
primarily denoted anything transparent, e.g., a transparent stone or gem, hence, a lens of crystal, a glass," Revelation 21:18, Revelation 21:21.
[ A-2,Noun,G2072, esoptron ]
"a mirror," is rendered "glass" in the AV of 1 Corinthians 13:12; James 1:23. See MIRROR.
Note: For the corresponding verb katoptrizo in 2 Corinthians 3:18 (Middle Voice), See BEHOLD, No. 12.
[ B-1,Adjective,G5193, hualinos ]
signifies "glassy, made of glass" (akin to A, No. 1), Revelation 4:6; Revelation 15:2 (twice), RV, "glassy."