Blue Chalcedony cabochon measures 21 x 14 x 7.87mm deep. Nice blue-violet color. Photographed with and without a flashlight, dry. Blue Chalcedony is a rarer form of chalcedony and a calmer of the emotional body and is here to help one communicate their truest thoughts and ideas. This encourages deeper discussions with the ones you love, which will not only strengthen your relationships, but also help awaken their emotional bodies as well.