This natural Petrovsky Shungite Specimen seems to be the rarest form of shungite. It is the one that is said to have the great levels of energy and minerals. This is a shiny grey colour so looks very different to Noble Shungite and the low grade common crystal.
It is even really unusual in how the cluster is formed!
Geologically very interesting to collectors. This is the only piece we have of Petrovsky Shungite. It is discounted as its been with us for a while.