This genuine Evil Eye bead is made of Diamond Transparent Murano Glass; size of the bead is 10mm. The eye is dangling from a delicate 4mm sterling silver cable chain. Size of necklace is 18 inch. I can prepare this necklace in any size you need, just let me know. It is available also with cobalt blue bead as well. It is available as a bracelet as well. The Evil Eye also called the invidious eye and the envious eye, is that a person can harm you, your children, your livestock, or your fruit trees, by "looking at them" with envy and praising them. To keep yourself safe from harm, negative energies, emitted by brain, use this amulet symbol either in a necklace or in a bracelet. It is a combination of a jewel and a strong protective symbol. Tradition states that the wearer is protected from envious stares, receives protection from all evil, and receives good luck.