(Conversion: 2.5cm = 25mm = approx. 1″ inch) Personalise this pendant with your choice of Add On birthstone or charm. Gemstone pendants are packaged in a lovely randomly chosen gift pouch with a description card, ready to give or keep for yourself! Chalcedony – was used as a sacred stone by Native American Indians, promoting stability within the ceremonial activities of the tribes. Chalcedony alleviates hostility, irritability and melancholy. It enhances generosity, responsiveness and receptivity. Pearl signifies faith, charity and innocence, enhances personal integrity.