Crystals have been used for millennia to heal and bring balance. They work through resonance and vibration.
Some crystals contain minerals that are known for their therapeutic properties. Copper, for instance, reduces swelling and inflammation. Malachite has a high concentration of copper, which aids aching joints and muscles. Wearing a Malachite bracelet allows the body to absorb minute amounts of copper in exactly the same way as a copper bracelet does.
Crystals are excellent for dealing with headaches. Lapis Lazuli will quickly draw off a migraine headache. If it is caused by stress, Amethyst, Amber or Turquoise will help.
Crystals heal holistically. That is to say, they work on the physical, emotional, mental and spiritual levels of beings, they realign subtle energies and dissolve disease, getting to the root cause. Crystals work through vibration rebalancing the biomagnetic sheath (aura) that surrounds the physical body.