Shungite Medium Tumblestone

Shungite is elementary noncrystalline carbon with a metastable structure incapable of graphitization. It is also used as a term to describe a sequence of metamorphic rocks from the Karelia region of Russia containing such carbon. Shungite is an intense black colour which outwardly resembles anthracite.

Approx tumble dimensions 20-30mm.  

(Size, shape and weight may vary)