Shungite

Found in the Karelia area of Russia
Hardness: 3.5-4
Shungite is said to be around 2 billion years old. It is most likely the result of ancient single cell life, transformed by volcanic heat under water.
It is one of the only known natural materials known to contain fullerenes, which is said to give it its powerful healing properties.
Noble Shungite contains a higher concentration of fullerenes. It is also known as Elite Shungite.
Powerful stone of protection, purification, healing, balance, and cleansing. Removes negative energies.
Shungite is said to absorb and eliminate anything that is a health hazard to human life, and it has active metaphysical properties with strong healing powers.