-Amethyst-

A very powerful & protective spiritual stone.
The metaphysical properties are calmness, balance, & peace, it's great for clearing a cluttered mind and cleansing your aura.
This stone will also help with strengthening your psychic abilities.
It is also excellent for reducing headaches, mood swings, anger, fear & anxiety.
Associated with the crown and third eye chakras.

Zodiac signs - Pisces , Aquarius, Virgo , Capricorn & Sagittarius 
Planets - Jupiter 
Element - Air & water