χαλκηδών G5472
chalkēdṓn · khal-kay-dohn' · Noun Masculine
from χαλκός and perhaps εἶδος; copper-like, i.e. "chalcedony":--chalcedony.
1 Occurrence in the King James Bible
Revelation 21:19And the foundations of the wall of the city were garnished with all manner of precious stones. The first foundation was jasper; the second, sapphire; the third, a chalcedony; the fourth, an emerald;