Caribbean blue chalcedony is a stone related to the element of water. Although it is dyed to give it such a bright blue colour, the colouring is of a basic "watery" nature. Caribbean blue chalcedony is very helpful in the emotional realm. It can calm anxieties and stress, and bring emotional healing in times of grief. It also assists with communication, particularly communications that are involved in emotional things. Physically, according to crystal healing and folk lore, Caribbean blue chalcedony can be used to heal menstrual cramps, PMS symptoms, and knee problems.