Shungite Harmoniser Sets are wonderful to use in Meditation. They work on the principle of a difference in the potential of the two stones. Always use the Shungite cylinder in the left hand as it represents the Yin energy. We have a variety of other Harmoniser Sets also. Selenite and Shungite work beautifully together as well as things like Rose quartz and Amethyst. All of these sets are perfect to use in meditation or to just hold when you feel the need. Type 2 Shungite.