Shungite

Shungite is most famously found in Russia, and comes in normal and 'noble' form. The normal form of Shungite, when raw, is black and almost coal-like. Even when polished, after handling it can leave black marks on your skin. Despite this, it has been used for centuries as a water purifier - Peter the Great created the first Russian spa where the spring water was purified by Shungite. Shungite is the only mineral known to contain fullerenes, which are powerful antioxidants. It is also widely popular for its ability to inhibit and block Electromagnetic Frequencies (EMF) due to the presence of fullerenes. It takes its name from the place where it was first found, Shun'ga in the Republic of Karelia, Russia.