Eye of tiger :

Stone that helps to fix concentration, meditation, will and vitality. She brings discernment and intuition by working on emotional blockages. It helps the proper functioning of the joints and the nervous system.

It is associated with the 3rd eye and solar plexus chakras. It works on the nervous system, stomach, bones and joints.

Obsidian:

Stone that protects against negative energies. It is a powerful shield against harmful influences. Acting both physically and spiritually, its black color gives it an advanced degree of consciousness. Renowned for absorbing pain and trauma, it is a liberating stone.

It is associated with the 3rd eye chakra. It works on virile power and sexual vigor.