Revelation of Jesus Christ
From the KJV 1611 with Strong's Concordance
G5116
τοπάζιον
topazion
{top-ad'-zee-on}
Neuter of a pressumed derivative (alternate) of τόπαζος [[topazos]] (a 'topaz'; of uncertain origin); a gem, probably the chrysolite.
topaz
Revelation 21:20.