Agate stone is known to rebalance and harmonize the body, mind and spirit. It is also known to cleanse and stabilize the aura, banishing negativity. Agate is believed to stimulate and strengthen our analytical capabilities, encouraging us to think clearly and concentrate upon the task at hand. It’s also believed that the stone allows us to gain inspiration from spiritual worlds.
Chakra - Crown Chakra
Zodiac - Gemini, Virgo
Element - Earth
 
Black Tourmaline is a protective stone which repels and blocks negative energies and psychic attack.  Black Tourmaline also aids in the removal of negative energies within a person or a space.  Black Tourmaline will cleanse, purify, and transform dense energy into a lighter vibration. It balances, harmonizes, and protects all of the Chakras.  Use Black Tourmaline to protect against electromagnetic "smog" (i.e. cell phones, computers, etc), radiation, noise sensitivity and other such disturbances.  Black Tourmaline can be used as an aid to remove fear and boost self-confidence.
Physically, Black Tourmaline helps to strengthen the immune system, balance the left and right hemispheres of the brain, and detoxify the body.  Black Tourmaline is very helpful when dealing with illnesses of the lungs such as bronchitis, emphysema, pneumonia and Pleurisy.  Black Tourmaline is a must for any medicine bag and is great for body layouts.
Chakras - Root  
Zodiac - Capricorn