Pyrite 

“Known as Fools Gold, pyrite comes from the Greek for “firestone” because it was believed that pyrite, a sparkling stone, held fire in its core. An excellent energy sheild, pyrite blocks out negativity energy and pollutants at all levels, preventing energy leaks from the physical body and aura, protecting subtle and physical bodies, and deflecting harm. It creates positive overlook. “ (Judy Hall) 

Zodiac: Leo