American Tract Society Bible Dictionary
A precious stone, resembling the agate; of various colors, but often a light brown or blue, Revelation 21:19 . It is found in most parts of the world, though named after Chalcedon in Bithynia opposite Constantinople; and is much used as a material for cups, vases, and other articles of taste. Carnelian is said to be one of its varieties.
These files are public domain and are a derivative of the topics are from American Tract Society Bible Dictionary published in 1859.
Rand, W. W. Entry for 'Chalcedony'. American Tract Society Bible Dictionary. https://www.studylight.org/dictionaries/eng/ats/c/chalcedony.html. 1859.