Black (Schorl) Tourmaline Crystals floating inside a quartz crystal!  Amazing!  Black Tourmaline is very grounding, use when you are feeling flighty. Many of my Reiki friends use this crystal to help them 'come down' after a Reiki session. I like to place one in my pocket before I begin my Reiki Healing, protects me from others energy. The addition of Quartz seems to amplify the already powerful Black Tourmaline.