Do crystals really give off a type of vibration?

Many people find it helpful to wear certain crystals or meditate with them. This much is beyond dispute. I don't know if it is all power of suggestion or there is some vibration which we have not figured out how to measure yet. The scoffers say there is nothing to it, but I believe it's best to keep an open mind. After all, we have not discovered all there is to know about the world around us.