Crackled Quartz TumblestoneFire and Ice quartz is quartz heated and then cooled quickly, making it fracture. So all crackle quartz fundamentally has the same energy as quartz. Chakra: AllZodiac: AllElement: All Physically:Stimulates the immune system and brings the body into balance.Emotionally:Balances all emotions.Spiritually:Clear Quartz enhances psychic abilities. Clear Quartz is known as the "master healer" and will amplify energy and thought, as well as the effect of other crystals. It absorbs, stores, releases and regulates energy. Clear Quartz draws off negative energy of all kinds, neutralising background radiation, including electromagnetic smog or petrochemical emanations. It balances and revitalises the physical, mental, emotional and spiritual planes. Every crystal purchased is cleansed before shipping and comes with information on the crystal free of charge CRYSTAL SIZES:Small = 5mm - 10mmMedium = 10mm - 20mmLarge = 20mm - 30mmX-Large = 30mm - 40mm