ACC ~ Revelation 21 v19c

ANDREW WAS IGNITED BY THE SPIRIT. ANDREW OF CAESAREA: This stone [chalcedony] was not borne on the breastplate of the high priest, but rather anthracite, which does not appear here. We are then of the opinion that at that time the saint called anthracite by another name. But anthracite indicates the blessed apostle Andrew, who like coal was ignited by the Spirit. COMMENTARY ON THE APOCALYPSE 21.19.

THE HUMILITY OF SAINTS IS HIDDEN. BEDE: Chalcedony shines like the pale fire of a lamp out of doors in the daylight. By this is shown those who, supported by heavenly desires, remain hidden [by their humility] to people as they practice in secret their fasting, almsgiving and prayers. But when they are commanded to demonstrate their teaching or other acts of saintly service in public they quickly do so in order that their inner glory might be shown forth. For that which remains after the sculptor has done his work draws dross to itself by the working of the sun’s rays or by the handling of warm hands. This property of chalcedony rightly agrees with those who do not permit their own strength to be conquered by anything but rather by their own light and ardor draw to themselves the more fragile, joining them to their own strength. Concerning one of these it was said, “He was a burning and shining lamp.” Clearly he was burning with love, and he was shining in speech. For in order that their own virtues might never go dark, they are always refreshed by the oil of internal charity. The fact that among the Nasmoneans, which is a region of Ethiopia, this stone is produced indicates those who are under the ardent fervor of love. However, there is an obscure opinion that this stone is dirty as with a dark skin. EXPLANATION OF THE APOCALYPSE 21.19.

Rev