Hematite

This shiny black, slate-gray or silvery-red mineral is used for safety during astral travel and to ground you once your spirit  returns to your body.  This crystal is very good for people with circulatory problems or anemia. It’s also excellent for memory and mental stimulation,  so witches wear hematite while performing spells that may be difficult or lengthy. If you were a witch in a previous life, by wearing hematite you may be able to tap into a precious existence and drum up some of the old spells and potions you used in the past.