Petrovsky shungite spheres

The size is 35mm (approximately 0.056kg) or 50mm (0.16kg).

Petrovsky shungite contains from 70% to 80% of carbon which is much more than regular shungite. The name evolved from that of the Russian emperor Peter the Great. Petrovsky Shungite has a very long history, full of incredible tales and legends, because people started using it even before the times of Peter the Great.