21.5g, 4.8cm. Shungite disinfects and cleans water, destroys bacteria, absorbs heavy metals, iron additives, organic compounds with chlorine, nitrates and ammonia from water. However, Marshal Kutuzov knew well why every soldier had to carry this stone with him. Napolon's soldiers got sick from the contaminated water, but the natives who drank the shungite-purified water did not. It enriches the water with trace elements, changes the energy information structure of the water and activates it.