Staurolite
Staurolite stones are quite unique in that they naturally form a cross within the stone. They are also known as fairy stones or as the fairy cross because they embody an energy that will help you to make contact with beings from the natural world.
They are said to have a soothing calming energy that helps to relieve stress, anxiety and fear, and some believe that they are useful to help you to stop smoking.
These cross stones are also thought to be a good grounding stone and to have a number of healing attributes.
By keeping some of these stones in your environment, this may also benefit the life of those who are close to you, as the energy of the fairy stones is reputed to help to create a connection to the natural world, in those who feel its resonance.