Each Shungite Palmstone is 5 x 4 x 1cm in size with a flat, disk-like oval shape.
Black Shungite or Petrovsky Shungite contains 75-50% carbon; it has a deep black color, similar to coal. Black Shungite is industrially mined, and due to its composition – carbon, other minerals, and chemical elements – can be cut in various shapes and polished.