Calais (green-blue gemstone) In Greek mythology, an Argonaut; son of Boreas and Orithyia; twin brother of Zetes (searcher). Calais and Zetes aided Jason as Argonauts. Both were given wings for recovering Phineus from the Harpies in Bithynia. When they were killed, they were transformed into birds. Ovid’s Metamorphoses (book 8) gives the myth.
SOURCE:
Encyclopedia of World Mythology and Legend, Third Edition – Written by Anthony S. Mercatante & James R. Dow
Copyright © 2009 by Anthony S. Mercatante