Turquoise is sacred to both Native American and oriental traditions. It is associated with the sky, and bringing sky energy to earth. It can help promote honest and clear communication from the heart.
Turquoise is also a powerful crystal for relieving stress. It is also said to protect against pollution in the environment, and to bring abundance. Turquoise is said also help speed the healing process, and is known as a master healer stone. It is very powerful for grounding and protection also. Turquoise is associated with the throat chakra primarily.
Note that healing crystal meanings are spiritual supports to healing and are not prescriptions or healthcare information.