According to the card, the 40 mm amulet is made of shungite and decorated with an engraving. Shungite is a natural black mineral, so the pattern of each piece differs slightly. The card does not specify where the stone comes from or exactly which engraving is used.
General information (not a manufacturer's instruction): shungite is a natural rock with a high carbon content; deposits are known in Karelia. The product is a piece of jewellery (an amulet), not a medicine or a medical device.