Crystal ball are used for divination (scrying) and spirit summoning. It is a well respected technique of divination and is used through the use of reflective surfaces and taking advantage of the bioplasmic energy (psychic power) in inanimate objects like crystals as it comes from the cosmos itself. If you can tune into that force the crystal ball will be very beneficial.
They should usually be made from clear quartz and can be large or small. Smoky quartz is beneficial if you mainly want to use it for summoning spirits. Manmade crystals are spiritually dead, so use those only for decoration. Natural crystals are what you want. Some people think it is better to be given one as a gift, but personally I think you should choose your own. It is a very personal object so you want to choose it carefully. You should be drawn to it and feel its energy.
The crystal ball is a tool of Pisces and the modern clear round ball is effective because it evokes the image of the moon. Now, some people can’t afford a real crystal ball, but there are other options. Even using something like a glass bottle of water, ink or water in a pan, etc. will give you some results, but the power of a cleansed crystal ball will be much more substantial.
A new crystal ball must be cleansed by exposing it to the light of the full moon at least once (13 times is ideal) before use. A crystal ball covered in negative energy and spiritual debris will cause disturbances and may not be accurate. Also, when you are not using it, you should keep in covered in a dark cloth. A great way to clean the crystal ball is with a blend of spring water and vinegar, charged waters, mugwort hydrosol or a water-based herbal infusion with dried mugwort and/or anise-seed.
Crystal-gazing is a great way to get into clairvoyance. You should stand the crystal ball on a black base or black cloth so that when you look into it there are no distractions. You don’t want anything to draw your attention away. The lighting should be behind you and it’s best to be in a semi-darkened room. Close your eyes and try to empty your mind and be open to the energies and aura around you. Then open your eyes and gaze into the center of the crystal. When you see a shadow or shape, clear your mind and follow them. You may immediately see someone or something or you may see it fill with smoke. The smoke will probably fill up the whole ball and then start to dissipate and leave a scene. This is called clouding.
If you don’t get anything, don’t worry. Keep looking for about ten minutes, but not much more. You don’t want to force anything or strain yourself in anyway. Just give up and try the next day. You will develop your own way of working with the crystal ball. Some see images right away, but sometimes you may need to try for a few days and weeks. Do not strain to get results, just relax and let it happen. At first you won’t have much control over what you see, but as you progress you will adjust and you will improve at clearing your mind and you will start to see what or whom you mentally ask for. If you are constantly getting negative or scary images or feelings you may want to try cleansing it again, cast a protective circle or simply try a different type of divination. Crystal balls just aren’t for everyone. Keep in mind when attempting to communicate with spirits, you should always cast a circle first.