These are a Set of 9 Pieces of Mix Stones extractor. In this set you will get 3 pieces of Quartz Crystal Stones, 3 Pieces of Rose Quartz Stones and 3 Pieces of Green Aventurine Stones. These Extractors are oval shaped and approximately 3 Cms to 4 Cms in Length and 2 Cms to 3 Cms in width. These stones are used in pranic healing as Extractor of diseased and dirty energy from the Chakras and to energize the Chakras with fresh rejunivating energy. These Extractors can also be put on the photograph of a person for healing. For more information please learn Grand Master Choa Kok Sui pranic healing.