This pyrite silver is made with sterling silver. The stone is unpolished and has some cubic features which shows the unusual and natural formations. This stone is an excellent energy shield and blocks out negative energies. It is positive and relieves anxiety, as well as helping with self worth and self confidence. Pyrite is also good for memory, and on a physical level helps to overcome fatigue and is beneficial for asthma and bronchitis. To be used with throat chakra.