Size of a quarter.
Shungite - The Black Beauty for Total Protection. Shungite can be used as a water purifier and has anti-aging properties. It can shield & protect our electric magnetic fields (auras- your body! ) from things like Negative Cell phone waves, computers and radiation. It allows & enhances a positive well-being. It is said Hospitals in Russia have made healing rooms out of shungite since the 1900's for speedy recoveries & its healing properties for their patients.