The Third Eye is Your Visualization Center
Let's learn more about this organ of inner perception: what it is, where it's located, and how it works.
Brow Chakra - From the Chakra Series - Exploring the major chakras
You will see bright light of all colors when the third eye opens. Your forehead will blaze like the sun.
Mr Yogi says the third eye is not part of physical body, but dwells in the subtle body (suksham sharir).
This web site treats the third eye like a chakra, listing deficient, excessive, and balanced energy states.
A simple page with attributes of the third eye chakra, with a mention of its element, color and mineral.
Reverend Esos shares this ritual for opening the third eye. He says it is a psychic "muscle" in the forehead.