Chalcedony is taken into account a sacred stone by Native People in america, chalcedony nurtures and encourages brotherhood and goodwill. Chalcedony is said to reduce hostility, irritability and melancholy. A gemstone with uniformed colour starting from pale blue to deep blue and that is the most precious color for chalcedony. https://gemstonesnearme64173.blogripley.com/31145118/detailed-notes-on-gemstones-south-africa