Amethyst

A variety of quartz found as crystals or masses commonly found in Brazil, South Africa and India. 

Amethyst is the ancient and modern birthstone for  February. It is also the stone for Pisces.

It is good for overall protection, physical, emotional and mental balance. It helps negotiate skills, decision-making, wealth and moving forward in life. It is good for headaches, insomnia, bad posture, cancer and arthritis.