Tourmaline is the Stone of the Shaman. Grounding, Soothing, Shielding and Releasing of negative energies. It aligns all Chakra Centers by releasing any negativity blocking the way. Tourmaline is also good for treating motion sickness. 

Raw cut so size/exact shape vary - Approximately 20-36mm x 7-16mm

These particular Tourmaline stones hail from Brazil.