Tiger's eye
Tiger's eye is a common stone that has been used in jewelry for centuries. Spiritualists who invest in the power of crystals believe that the tiger's eye can greatly improve insight. Those who possess the stone are said to be able to easily identify the evil eye and avoid negativity in their lives. The tiger's eye is also said to provide protection and clear thinking.
Black onyx
To spiritualists, onyx is the most protective stone in the realm of crystals. Not only is it said to absorb negativity, but it deflects it away from the possessor. Its dark color in the absence of light is assumed to make the possessor "invisible" to negativity and harm. While its a powerful crystal on its own, it is said to become stronger when enhanced with amethyst.
Eye agate
Eye agate, a version of the agate stone, has bands that loop outward and resemble an eye. Like onyx, it is said to have strong protective properties against the negativity of stress, bitterness and even pain. It is one of the most powerful crystals against the evil eye, making it popular in jewelry such as amulets and bracelets. Possessing an eye agate can also give you strength and help you balance your emotions.