Bible Dictionaries
Chalcedony
Vine's Expository Dictionary of NT Words
the name of a gem, including several varities, one of which resembles a cornelian, is "supposed to denote a green silicate of copper found in the mines near Chalcedon" (Swete, on the Apocalypse), Revelation 21:19 .
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Bibliography Information
Vines, W. E., M. A. Entry for 'Chalcedony'. Vine's Expository Dictionary of NT Words. https://www.studylight.org/dictionaries/eng/ved/c/chalcedony.html. 1940.