|Easton's Bible Dictionary|
Mentioned only in Revelation 21:19, as one of the precious stones in the foundation of the New Jerusalem. The name of this stone is derived from Chalcedon, where it is said to have been first discovered. In modern mineralogy this is the name of an agate-like quartz of a bluish colour. Pliny so names the Indian ruby. The mineral intended in Revelation is probably the Hebrew nophekh, translated "emerald" (Exodus 28:18; 39:11; Ezek. 27:16; 28:13). It is rendered "anthrax" in the LXX., and "carbunculus" in the Vulgate. (see CARBUNCLE.)
Noah Webster's Dictionary
(n.) A cryptocrystalline, translucent variety of quartz, having usually a whitish color, and a luster nearly like wax.
Int. Standard Bible Encyclopedia
See STONES, PRECIOUS.
Chalcedony (1 Occurrence)
Revelation 21:19 The foundations of the city's wall were adorned with all kinds of precious stones. The first foundation was jasper; the second, sapphire; the third, chalcedony; the fourth, emerald; (WEB KJV WEY ASV BBE DBY WBS YLT NAS NIV)