Energy: This crystal is best known as a stone for grounding you when you feel out of sorts. If you are a light worker you will need this to balance out the chaotic energies that you may encounter with in the work you do.
Physical: This crystal can bring your energy into t=a balanced grouted state allowing you to balance and recover. Keeping Hematite in your car will help keep you focused while driving. By the same thought to much hematite may make you sluggish and tired if you are surrounded but it all the time.
Size, shape and weight vary per stone.