Amethyst is the Birthstone for February.

The Zodiac stone 

for Virgo, Sagittarius, Capricorn, Aquarius, Pisces

Meaning

It is a powerful and protective stone. It relieves stress and strain. Instills inner peace and healing and dissolves negativity.

It can helps with Addictions, Anger, Anxiety, Fear, 

Grief, Intuition, & Memory, 

Healing

 CFS, Depression, Fibromyalgia, Headaches, Insomnia, MS, Immune System, PTSD