There are many ways to choose a crystal, described in the various books out there. You can do a muscle-test, you can read what the crystal is about, I encourage you to do what speaks to you. I personally will go to the crystals that draw me, and that gives me a strong urge to pick up and hold.
In order to understand what crystals do, you have to become very relaxed, almost in a lazy state. Totally relax, and jsut let go, and tune into the crystal, and somehow things will just come through, it is almost like it is second nature. Like the action of turning your head from left to right. Whatever comes through your mind first is the right thing. Do not let your human side come into play and put doubt or question into the process.
Everything on this planet vibrates more or less. Some things vibrate less, and some vibrate more. Crystal very often will vibrate higher than most people, but only because the person may not be vibrating at its genuine operation. In the atom, we find neutrons and protons and electrons, and they vibrate; there are also in the nucleus of the atom sub-atomic particles, which have various names, and are currently being discovered. The technique I like to use to connect to the vibration of crystals is called fusion, where the energies merge. The secret to living pleasantly is to feel good. Albert Einstein noted that everything in life is vibration, and just like sound waves, your thoughts match the vibrations of everything that manifests in your life. Therefore, if you think crystals have healing potential, the positive vibes of the stones will amplify those thoughts.
Make sure that the places you go to find or purchase your gem or crystals have good energy -and feel uplifting. Don’t sit and stare at a pile for hours, choose the one(s) that grab your attention first, pick them up and get a feel for them. Pick the one(s) you are drawn to; if you are not drawn to any leave. If you are searching for a specific type, let’s say you want a nice piece of clear quartz; pick the one you like best. It is really simple to choose and you can’t make a wrong decision when buying or finding your gem or crystal. Gem Or Crystal energy when programmed/cleansed can really neutralize your environment.