Pyrite thumb / worry stone, perfect to keep in your pocket. 
 
Pyrite
Fool's Gold
Solar Plexus Chakra
Leo
 
Holistic Healing:
Traditionally associated with confidence, determination and abundance. In crystal lore it is also linked to the lungs and breathing, to energy and vitality, and to confidence in money matters.
 
Metaphysical Traditions:
Regarded in tradition as a shield against negativity and a stone of prosperity kept in the workplace.
 
Cool Facts:
Pyrite's name comes from the Greek pyr, fire, because striking it against steel makes sparks – it was used in early firearms.
It forms perfect natural cubes, and the ones from Navajún in Spain are famous for looking machine-made.
Pyrite fooled many prospectors, but real gold is often found alongside it – and pyrite can contain traces of gold.