The fifth chakra, Vishuddha, is the first of the three spiritual chakras. In the area of the throat, it governs the anatomical regions of the thyroid, parathyroid, jaw, neck, mouth, tongue, and larynx. To be open and aligned in the fifth chakra is to speak, listen, and express yourself from a higher form of communication. Faith and understanding combine the essence of the Vishuddha chakra. (source)
Some crystals that we carry that my help you balance your throat chakra are Sodalite, Amazonite, and Blue Lace Agate.