Amethyst

Chakra: Crown

Metaphysical properties:

Amethyst is a crystal of meditation, it is excellent in conducting the energy of calmness and peacefulness to help you both enter and maintain the state. It opens and stimulates your crown chakra, clears your aura and also provides strength, stability, invigoration and peace.

Scientific properties:

Amethyst is one of the most highly valued stones in the quartz group. the name translates to "not drunken" (Greek) as amethyst was worn as an amulet against drunkenness. The naturally occurring colouring agent that gives amethyst its purple colouring is iron. 

Found in : Australia, Brazil, Uruguay, Madagascar, India, Canada, USA, Mexico, Namibia and Russia.

 Crystal system: Trigonal (hexagonal prisms)