Blue Lace Agate can be worn or carried to assist you with feelings of depression and sadness. It is a good stone to work with when dealing with mental disorders while also seeking/engaging in medical intervention.
Put it under your pillow to prevent nightmares and aid with sleep. This stone puts up a protective veil that surrounds your body and can ward off psychic attack. It brings peace in the way of a deep knowing that you are protected and safe.
Blue Lace Agate is also a good stone for those who have a fear of public speaking: it opens and relaxes the throat chakra to allow you to speak easily and effortlessly.