An extract from Judy Hall, "Crystals transmit and receive energies. They transmute and transform, attract or repel. The most powerful may appear dull - until the beneficial effects are felt. They bring serenity to the home, peace to an individual. They protect or heal, attract abundance, and create love. Objects of beauty in their own right, they enhance the environment  wherever they are placed."

Crystals have energy
These are just a few things crystals can do: They treat food, water, plants and animals and us humans. They can even help you use less petrol in ones car by making it run more efficiently. Meditation is enhanced, deepening atonement with universal energies; aid manifestation, drawing close whatever is necessary; absorbs negative energies while strengthens positive energies and offers protection.
Crystals resonate at different frequencies and can both store and retrieve information. They magnetically attract certain things, and even repel unwanted energies.

Crystals as energy transmitters
Do you know that crystals due to their crystalline structures are able to absorb, focus and then transmit subtle electromagnetic energy. This is the energy used in crystal healing. No one is sure as yet, how they  communicate their energies to us. Although silicone is both important to us (our bodies) and the crystal, they might transfer their energies between the two. Most people believe that the crystal work through the aura or etheric body. That is the slight magnetic field around the body.
Science has shown that if a crystal is placed in an energy field, it collects that energy and contains it. Some might change and transmit the energy during this process. Quartz usually amplifies the energy, it then radiates out again. The exception is the black crystal, they absorb energy but do not release it. This makes them most useful against unpleasant or hostile vibrations.
If you hold a crystal it at least doubles your aura. This can be verified by a photograph taken by a kirlian camera. A needle from an acupuncturist coated in quartz effect is enhanced 10 - 12 %

Cosmic energy transceivers
Did you know birthstones receive cosmic energy, focus it, and then resonate it to the wearer. In other words they act as a transceiver for cosmic energies linking the earth and the heavens. This will align the wearer with cosmic forces that flow through-out the universe, which will enhance their health and well being. These stones may need cleansing and energising from time to time, but they never loose their effectiveness or power, and never wear out.