I call them my gris gris mojo beads. Some may call them wanga.
What these beads technically are called is Phoenician and Bactrian glass and they are really old. Like really really old as in about 2000 years old. Even though they are incredibly ancient they are not proportionally rare or expensive.
Some beads will a have a zig zag line that is supposed to confuse an evil eye which of course would be lost in the zig zagging line, that is if an evil eye were to come round.
Beads with the eye design supposedly absorb evil energy, therefore protecting the person who wears it. An according to legend you should wear coordinating eye color with bead eye color. Hence the big blue eye bead is for me. As a courtesy, I also wear a brown eye bead to protect anyone who is standing nearby me. The red color eye bead is good if I have a late night of reading or being on the computer. One can never be over protected when it comes to the evil eye.
But as you can see below, these beads don't always perform their mojo, as witnessed by this sorry excuse of a cake I attempted to make today.