Chalcedony has a lovely gentle, dream-like energy. It promotes a feeling of light-heartedness and honesty, calming and easing stress and opening up a path to creativity. It's the perfect stone to have around if your work involves creativity and you need an extra bit of inspiration now and again. Chalcedony helps bring the emotions, physical, mental and spiritual into balance. It is a stone of harmony. Also can assist with telepathy and dissipating negative energies.
In addition to the above:
Blue chalcedony is an excellent stone when dealing with communication issues. A piece of the stone is often put under the pillow to help ease bad dreams and promote a calmer night's sleep.