Some people also consider it rude if you touch their crystals... you mess with their energy that has been put into the crystal.
Crystals have different metaphysical properties, so if you need a crystal for something specific you need to do a lil research....
They also have a tendency of choosing you instead of the other way around... if this happens the go with it, if possible.... it's like they know you need them even before you do.
Hi, how long have you used them for? I think they are usually very subtle. What kind of crystals are you using? I think some of them at least do help; all the ones that belong to the quartz family. Are you looking to work on your third eye chackra? I think this is the one for creativity and intuition.
My wife put one behind the couch where I sit and watch TV sometimes. Then I noticed that my headaches were decreasing and it was pretty sure it's a lava lamp that was helping because I read that they can help with headaches. And that was after I noticed it made a difference so It wasn't the power of suggestion