Hematite is an excellent grounding crystal, as it provides an overall sense of security, stability, and safety. 
This gem is ideal for protection, especially against psychic attacks. It also re-balances your energy while keeping away negativity. Moreover, Hematite removes blockages, toxic emotions, bad feelings, and negative thoughts. 
It also combats stress and anxiety while repelling fear and stimulating self-confidence, courage, and strength.