The key crystal is recognized by a three or six-sided indentation somewhere on the crystal. A Key crystal can be used to unlock the doors to healing, help answer difficult questions, solve problems, and access hidden information. Most people find a Key crystal, then rush home to meditate and access it. However, we would advise meditating with and using the crystal for a few weeks before trying the Key as the visionary aspects & energies can be very powerful if you aren’t prepared. The vibrations of these crystals need time to meld with your own aura.