You will see this blue glass piece everywhere in Turkey.
Nazar boncuğu is a glass bead that protects the holder from evil eye. It is pretty common in Turkey. Have a look around and you might discover countless Nazar Boncuks dangling from cars, from rear-view windows, backpacks, on necklaces and bracelets, pinned to the sweaters of babies and small childered, and hanging above doors in restaurants, hotels, stores, and apartments. Have a look around you and you will be amazed how many you see.
Even on this web site 
hallo,
kan ik deze Nazar boncuk bestellen.
en wat kost het.
Bedankt Sita
allah nazarlardan korusun