Auras. In metaphysics, Aura refers to the energy field emanating from the surface of a person or object. This emanation is visualized as an outline of cascading color and may be held to represent soul vibrations, chakric emergence, or a reflection of surrounding energy fields.
Auras may be viewed by the naked eye, though some psychics, like Edgar Cayce, believe this ability weakens with age. Focused training may improve one's ability to see auras. Layers of aura are separate and distinct yet connected to all the remaining layers. In the books of Carlos Castaneda auras are referred to as luminous cocoons.
Modern New Age metaphysics identify the aura as electromagnetic fields. The existence of electromagnetic fields around every object in the known world is a scientifically proven fact. What is debatable is whether or not humans can see these electromagnetic fields as colors with the naked eye. This claim is considered paranormal because devices that sense electromagnetic fields at magnitudes many times smaller than that which allegedly exists in auras have recorded nothing.
In truth this energy field not only goes around you, but moves within your body as well. It is not just the outside of your body that is made of electromagnetic energies, every part of your and everything your experience in third dimension.
Auras vibrate to different color, sound and light frequencies. The color spectrum varies with one's physical, emotional, mental, and spiritual states.
If the aura sways back and forth, the person has a chemical imbalance, due to drugs, medication, drinking, a chemical imbalance in the body.
Your aura usually consist of more than one color at a time.
It can extend out very far or remain close to the body, which occurs when the person is protecting themselves form someone or something.
Some people can psychically look at the subject and see images within the person's aura. These images may include symbols/archetypes, people, digits, or even another aspect of the person's soul that is coming through in their third dimensional aura from another realm.
When two people have just been lovers, they will show up in each other auras, the color of their auras depending on the nature of their relationship.
When people have done healing work together - or shared any physical contact - they will share a common auric field for a period of time as they have just merged their electromagnetic energies.
This was from http://www.crystalinks.com/aura.html , I do not take any credit or respolsibility of the content of this article.