Indigo gabbro can help you expand your knowledge and deepen your insight. The energy of this stone can help you heal past hurts and darkness so that you can act with a higher purpose. An excellent stone to use in the practice of Reiki. It resonates with the third eye chakra, zodiac sign of Libra and has a vibrational number 7.
Crystal Skulls help to open up your upper chakras and connect you with your spirit guides and guardian angels. They are used in meditation and you can visualize, while holding the skull, that the guidance and answers coming to you from the spiritual realm are entering or channeling through the skull to you. When they are in pairs or more, they will amplify the energies of one another, similar to how humans interact when they are having conversations and feeding off one another’s ideas and energy. Of course you can have only one, it’s just added and intensified energy if you have more than one.