Filtering out negative energy.  Grounding, Protective.  Aids organization and memory.  Assists in manifesting dreams, coming back to the body.

Chakras: Root
Elements: Earth

Healing and balance, purification, relieves stress, promotes relaxation and serenity, provides calm especially during times of high stress or loss, aids with insomnia and nightmares.

Chakras: Heart, Third Eye
Elements: Water