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.
Although written in 1859 by William Rand, this dictionary of the Bible from the American Tract Society is still relevant today.Wikipedia
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