Shungite river tumbled

What is special about this product it is that these shungite pebbles have been tumbled by nature itself. River tumbled shungites belong to inland pebbles (river pebbles or river rock) and are found along the shores of large rivers in Karelia. River tumbled shungite pebbles are formed as the flowing water washes over rock particles that lay on the bottom and along the shores of the river. River current is gentler than the ocean waves so river pebbles cannot be as smooth as ocean pebbles. So, perfect in their imperfection, river tumbled shungite pebbles are brought to you straight from the bottom of ice-cold northern rivers. (Price per kilogram)