Dimensions of the sphere: circumference of 17.2 cm.
Black obsidian has always been used as a protection stone to eliminate negative energies. In crystal therapy it is a stone of self-knowledge, it gives mental clarity, brings the most hidden emotions and thoughts to the surface, instills the energy necessary to overcome traumas and fears. Obsidian is associated with the first chakra, the root chakra. It is also a stone that reduces stress.