What is the origin of the Evil Eye in Christianity?

My family owns several charms—such as necklaces, bracelets, and small stones—with the [Evil Eye](http://en.wikipedia.org/wiki/Evil_Eye) symbol on it. My family is Christian, and if I remember correctly the Evil Eye is of Turkish origin. This would imply that the Evil Eye has Muslim roots. What could possibly explain why my Christian family owns items of Muslim origin? The artistry of the piece is indeed something that would warrant owning it, but my mom has spoken to me of it religiously, in that it "wards off evil spirits."