Grape Agate, also known as Purple Chalcedony. Grape Agate works with the Third Eye and Crown Chakras. A wonderful stone to work with for activating psychic abilities, mental clarity, intuition, lucid dreaming, meditation, trust, truth, astral travel, confidence, and stability. Good Stone for dreaming.
 
Please note that each stone may appear a little different than the ones in the photo, each piece is unique and individual.