Chalcedony has the power to soothe self-doubt and bring inner peace to the wearer.
It is believed that blue chalcedony helps in calming and centering the emotional energy, while encouraging the wearer to acquire tranquillity. 
In chakra practices, chalcedony is believed to be the stone of communication and is often placed by the pharynx to stimulate the throat chakra.
The throat chakra is considered the voice and allows energy or pressure from the other chakras to be released.
Chalcedony is a powerful stone associated with integrity and honesty.
It will promote a calm and tranquil atmosphere and revitalize low levels of energy.