-Herkimer Diamond - 

A Herkimer diamond is a beautiful double terminated quartz crystal that can be found in Herkimer village, New York, known as the Stone of Attunement because it can help you attune to any situation or environment.
This crystal is also an ascension stone. It will bring you to your highest spiritual vibration while taking care of your physical body as well.
It has powerful metaphysical properties that can help connect astral to the physical plane & enhance your clairaudient, clairvoyant & telepathic abilities due to their high frequency.
It can get rid of tensions and help the body realign its energies. It can also be quite effective in boosting your immune system. 
Placing a Herkimer Diamond under your pillow whilst you sleep will enhance and stimulate lucid dreaming & help you to understand the messages of your dreams.

Associated with the Crown & Third Eye Chakras.
Zodiac signs - All
Planets - Sun
Element - Storm