Welcome to EC, William. Myself, and a lot of others on here, like to wear black tourmaline for psychic protection. Black stones are good for grounding as well. I read that fluorite is a good empath stone,http://dragonmoon.ca/en/fluorite-rough-16145?search=fluorite That link is where I read it. Citrine is a good negativity cleanser. Quartz is another good one as it amplifies other stones and is a good general healing stone.
You can visualize what ever you are comfortable with for protection. Rose quartz is good for a gentle healing of heart issues. I do feel I need protection personally. I have a person from my past that keeps attacking me mentally and trying to get back in my life. I can feel when he is planning something and I send stay away thoughts back. He doesn't stop, however he can get through he will from hacking me to phoning, etc. I do not have any love to send him or I might try that. If I could conquer my fears with love that would be nice but I haven't been able to achieve that. That is something to ponder again though Peter, thanks for the input.