Obsidian is known to have excellent healing properties. It is known as a stone of protection, and shields the wearer from negativity. Obsidian rids the wearer of resentments they have been holding on to, allowing one to feel free, present and calm.
In certain spiritual circles and in the practice of feng shui, it is thought that in order to succeed in this life and achieve all the goals you have, you need to protect yourself from the Evil Eye. Negativity, bad feelings, and the evil eye of people around you may affect you carelessly, unintentionally, or on purpose.
Wearing a red string bracelet around your left wrist is a tradition used to ward off misfortune and darkness brought about by the evil eye.