Blue Chalcedony

Absorbs negativity and promotes harmonious emotions, often used during public speaking.  Working with the Throat and Third Eye Chakras, it is believed to facilitate an exuberant vibe from a speaker to an audience.  can bring a sense of generosity to the holder, imparting more joy into one's life centered around service to others. Soothing and calming this stone is great for promoting a sense of peace and joy; it carries similar properties, such as cleansing, healing, and balancing; helps to relieve one of the negative emotions, bringing a greater sense of overall happiness into one's life.  Source:  http://www.healingcrystals.com/Chalcedony,_Blue_Articles_17.html