Blue Chalcedony is from the Quartz family. It has a nice, calming energy that promotes harmony. It resonates well with the Throat Chakra helping one to speak better in public.
It helps with depression and can give the immune system a boost.
Chakras: Throat, 3rd Eye
Astrological Sign: Cancer, Sagitarius
Number Vibration: 9
Chemical Comp: SiO2 Silicon Dioxide