The throat chakra is the voice of the body. It is a pressure valve that allows the energy from the other chakra to be expressed. If it is out of balance or blocked it can affect the health of the other chakras.
When it is in balance we can express what we think and what we feel. We can communicate our ideas, beliefs, and emotions. When the throat chakra is in balance and open, we can bring our personal truth out into the world.
When the throat chakra is in balance we have a easy flow of energy within the body and spirit. The energy that springs upward from the sacral chakra through the solar plexus can continue its path enabling free expression of the values and needs expressed within the energy..
When the throat chakra is out of balance the physical symptoms may include sore throats, tight jaws, stiff neck, and headaches. When it is out of balance spiritually you might find yourself habitually lying, feeling fear and doubt about the intentions of others, or find yourself stammering or at a loss for words. You will likely have feelings of being isolated and misunderstood. You may well have symptoms of other chakras being out of balance. This is caused by the throat chakra blocking the energy flow from the other centers.
Blue crystal energy will unblock and balance the throat chakra. The dark shades of blue have the power of truth. Lighter shades have the power of flexibility relaxation and balance.
Yellow crystals should be used to augment the blue crystal for throat chakra balancing. The yellow crystals bring the power of communication and free expression drawing the energy from the solar plexus.
Blog Source: Crystal Vaults | Throat Chakra Explained