There are probably as many descriptions of this Chakra as there are people. Here you'll get mine and I won't claim for a second that it matches anyone elses. Spirituality, light energy, strong connection to the spiritual, purity and clarity, unity of all colors, higher planes of consciousness, divine energy and enlightenment. Imbalances can cause Too little contact to earth, daydreaming, too high energy concentration, energy build-up, pain, uncentered and uncontrolled energy accumulation.
White sunlight contains the entire color spectrum.
In some situations we can see all of the colors, as in a rainbow, or when light falls through a prism. Many forms of therapy and meditation use white light as a medium for healing or for the transformation of consciousness. Like a Fourth of July sparkler, the Solar Star chakra sparkles and twinkles with a golden hue about six to twelve inches above the crown of your head. My hunch is it's part of our personal merkabah, the very vehicle that is allowing us to ascend to a new state of Being. As for the interdimensional communication link, the solar star is quite easily accessed by those on the path, affording a clearer connection to higher dimensional Beings and frequencies.