The Evil Eye is a glass product, a round piece of light blue or dark blue glass with a little white in the middle and a little black on it. Of course, there are many changes, such as inlaying in different shapes of shells or making water drop shape, love shape and other shapes. Fishing accessories, wind chimes, bracelets, necklaces and many other shapes.
There are many folklores about the Evil Eye. One of them is that in ancient times, there was a witch with evil eyes. As long as people were stared at by her jealous eyes, they would immediately turn into stones. Later, people pressed Medusa under the column, dug out her eyes, and made large and small things to hang up to fight poison with poison. This is the prototype of "Evil Eye".
Source: @mima_szpilka