Many people ask about third eye work. So, here are my thoughts on it. Hope it clarifies a few things.
The 6th chakra is actually located in the middle of your head. The meditations on this chakra should not really be employed alone, but as part of a whole chakra programme. The colour for this chakra is a bluey-violet. If you want to work on your chakras, you should try to work every day, as the work is progeressive, and will deteriorate without practice. "Ohm" is the traditional chant for this chakra.
I would not recommend focusing on any chakra exclusively, and pushing your "third eye" to open without correct preparation is inadvisable. Rather, employ balanced chakra work, with additional life and health skills, and nature will take it's course.
The third eye is the chakra of Spirit. It is related to clairvoyance, (and clairaudience, clairsentience and others, there are many). Typically, it's colour is variations of purples, and turquoise. Spirit is not Soul. Spirit is clear, direct and initiating, where soul is receptive, - organising experience. When our third eye opens, we might need to spend time understanding it, and gaining mastery over it. This chakra gives us an 'awakening', a need to enjoy the completeness of harmony of soul, spirit, emotions, mind, and body.
This is the chakra of intuition. This leads to a greater understanding of information recieved on more subtle levels. We have shifted our conscioussnes. We begin to listen to the instructions of our spirits.
When our third eye is balanced, we feel in command of our lives. We are confident and courageous.
Headaches, confusion, spiritual fatigue, psychological problems or panic attacks and depression, can be signs of over activity in third eye. These ae common when people focus too much on forcing this chakra open without sound preparation. Please, don't rush in to open this chakra, when it is the right time, no forcing should be necessary.
An underactive third eye is somewhat like a spiritual prison. It causes a person to feel frightened, isolated, and unassertive. They will be out of touch with their intuition, and with their spirituality.
I cannot overemphasise that working on this chakra, before you are ready, will make you poorly. I liken it to forcing kittens' eyes open. Remember that the goal of chakras is to be Balanced. If your third eye is closed, and other chakra work has been neglected, you are not ready! there is a reason why kittens have closed eyes.
If you are ready, try 'breathing' purpley colours into this chakra. There are many meditations online for it. Take note of spirit in nature, in music, art, and all that is aesthetic. Look back on your life and recognise when you acted on inspiration from your spirit. (Most children are good at this). As with all chakra practice, play! Have fun with it. Explore the arts. :D
Quietening fragrances include white musk and hyacinth. Stimulating fragrances are violet, and rose geranium. Crystals can be placed on the brow during meditation, like, amethyst, sapphire, calcate, and blue and white flourite.
Hope this is of some help :)