Can I wear pendant that's symbol of peace? A year ago I bought one and I just got it is NDC (Nuclear Disarmament Campaign). I don't mind but I wanted feeling peace through everything what I need to having it. And soon I'm gonna practicing vipassana meditation. 
Can I wear pendant that I have ?
That is in harmony with nonviolent Buddhism however on a vipassana retreat there is noble silence, and anything worn that said anything would be as distracting as spoken words.