Herkimer Diamond - is a very special double terminated crystal. The Herkimer diamond is known as the attunement stone, and the energy of the Herkimer helps you to begin again in this lifetime. The Herkimer induces joy, inspires independence and improves any type of relationship. It enhances your dream state, helps balances polarities, and increases your energy. It can be used to attune yourself with another person, environment or activity.