Properties: Heightens energetic impulse of quartz. Illuminator of the soul. Cleanses and energises the aura. Aids letting go of past. Draws off negative energy, reaches root of problems. Protects against psychic attack. Acts as anti-depressant. Repels parasites. Absorbs mercury poisoning. Revitalises. Stimulates and balances thyroid.
Position: Neck for thyroid; solar plexus for energy; ear's to balance and align.
Disclosure: If you're worried about your health always see your doctor first. There are no guarantees with crystals, but they may enhance your life.