There are 1000 major crystals in healing that seem to have beneficial effect. The number of crystals in healing and energy healing is growing exponentially as more and more people learn about crystal properties.
The result of applying precise protection stones is that in your mind you feel safe and as well getting support from the beneficial crystal vibration. So if someone ask you, do you need protection you know that you are beginning to address your insecurity, lack of boundary or just bad company in your life.
Take your favorite two power stones. It could be red or yellow Tiger Eye, and any other stones you feel are your personal power stones. Put each of them in your left and right pants pocket. Now, go do your stuff what ever it is, and if you at any point feel insecure, helpless or attacked simply affirm to your self: I can handle this!