There are a total of 9 gemstones associated with December for a birthstone.
The top two are Turquoise and Lapis Lazuli.
Turquoise can: ground and balance a person; provide protection; heal spiritual trauma; further peace of mind; allow love to come; give a way to communicate on emotional issues, on creativity and on intuition.
Buying a piece of turquoise jewelry can enhance you in many ways. It is a gentle and beautiful stone, which is the color of the sky and sometimes a combination of sky and earth.
Lapis: “stone of total awareness,” expands intellectual capacity, attunes intuition.