It is my understanding and experience that the thymus chakra is related to self-awareness and authenticity. This chakra is called the chakra of the new millenium as its function has finally become fully supported by the influx of fifth dimensional energy.
The gemstones that I have used on this chakra are chrysocolla, labradorite, amazonite and turquoise.
The note associated with the thymus chakra is F sharp. This can be used in sound healing therapy.