CHAIN IS NOT INCLUDED. Available in Solid 14K Yellow or White Gold, or in Sterling Silver. Size Reference: 17mm is the size of a US dime, 21mm is the size of a US nickel, 24mm is the size of a US quarter. Color Laser is a patent pending process, color is guaranteed to last forever. Color Medals can be worn in the pool, shower, etc. without affecting the image. We guarantee it. Saint Luke was an early Christian leader who is said by tradition to be the author of both the Gospel of Luke and the Acts of the Apostles, the third and the fifth books, respectively, of the New Testament. The composition of the writings, as well as the range of vocabulary used, indicate that the author was an educated man. The quote in the Letter of Paul to the Colossians differentiating between Luke and other colleagues "of the circumcision" has caused many to speculate that this indicates Luke was a Gentile. If this were true, it would make Luke the only writer of the New Testament who can clearly be identified as not being Jewish. However, that is not the only possibility. The phrase could just as easily be used to differentiate between those Christians who strictly observed the rituals of Judaism and those who didnt. He is Patron Saint of Artists, Physicians, Surgeons, and others PicturesOnGold.com Saint Raphael Religious Medal With or Without a Custom Engraved Message on The Back Side.