Telephone Tarot Reading use all sorts of tools. Crystals are the most popular too!
Crystals have many varied uses. The only limit is intention and imagination. They can be used merely as beautiful decorative items. Ive seen them used from Geode bookends to Agate slice drink coasters. The color and type of crystal in jewelry can be an adornment or attract certain energies on your body and home.
Use crystals on your bedside table can attract energies into your dreams. They can also be used as fixes like Feng Shui. Start with your intention. If you desire more peace in your household, using crystals like Rose Quartz can bring more compassion and gentleness into the space. Surely blending this along with Feng Shui with a Baqua map may make a difference too.
The same ideas apply to the wearing of crystals in telephone tarot readings. The intent is the first step that will lead you to the right system and right stones. There are Astrological and Chakra associations that could be used. If you are inclined, the Sephirah has gem associations. Most people are familiar with the idea of birthstones in Astrological association. You could go a step further beyond Sun Signs by using full planetary energies associated with crystals. Use these associations to create the energy in your environment or jewelry. For example, if you want to work on your communication skills, then a necklace of Turquoise or another blue stone would be a good way to bring energy right to that center.
You can find crystals anywhere from crystal museums, shows, local rocks, lapidary shops, and new age metaphysical bookstores. Experiment by getting sample pieces of polished or bits to see how it feels.
As always, it is your intention to have them clean and free of negative energy. If you have any questions on the type of crystal that may be right for you, I can gladly assist in your telephone tarot reading and more.