Clear Quartz enhances psychic abilities. It aids concentration and unlocks memory. Stimulates the immune system and brings the body into balance. Clear Quartz (Crystal Quartz, Rock Crystal) harmonises all the chakras and aligns the subtle bodies. Great for jewelry, medicine or amulet bags, or carry with you. Picked at random, each stone is a minimum of 16mm. I bought out a metaphysical store many years ago, and these were part of the many treasures included. I was not given a location where they were found, and I cannot obtain more. Sold individually, undrilled. NOTE: If you are buying more than one item or lot, I will figure out actual shipping based on weight and refund you any difference.