Amethyst

Amethyst is a purple gemstone, and it has a hardness of 7 on the Mohn scale. The Ancient Greeks the stone protected the wearer from drunkenness and helped keep a balanced mindset.
Amethyst can be found in Brazil, Sri Lanka, Siberia,
and the Far East. Amethyst is used as a dream stone , and to help insomnia. Put one under your pillow you will have good dreams, or rub it on your forehead to bring relief.