Crystal Power, Black Agate Bracelet… Strength & Protection. Crystal properties and health benefits: - Black Agate is said to be the stone of protection, success and courage - said to protect people from things such as stress and bad dreams. All Crystal Bracelets come in a beautiful coloured pouch and are infused with Reiki Energy and a positive intention. We include a loving note on how to care for and charge your healing crystal bracelet. If it is purchased as a gift, a message to the special person can be enclosed in the pouch.