The stars of Istanbul: Nazar Boncuk I

Is the Little Magic Stone that protects one from the *Evil Eye*

This is a typical item, a specialty of this region you should take home as a souvenir.
It's called the Boncuk, the Little Magic Stone that protects one from the *Evil Eye*.
You will see this blue glass piece everywhere here in this area.

But what is behind this superstition?