The document discusses how crystals can be used for protection against negativity and evil eye. Certain crystals like black tourmaline, black onyx, and black obsidian absorb and repel negative energy to create an protective shield around the aura. Amethyst transforms negativity into positivity and creates healing energies. Shiva's eye and smoky quartz also protect from ill intent and stress by absorbing negativity and radiating positive energy. The document recommends using a combination of these crystals or individually to remain energetically protected.