Malachite 
 
Stone of Transformation - Malachite absorbs negative energies. Protects the wearer from harm. Absorbs pollution, purifies, and shields against radioactivity. Encourages us to step out of comfort zone and take a chance. Helps to break ties to the past, a very powerful stone for change.
 
Malachite should be cleansed regularly. 
 
Chakras - Heart, Throat & Third Eye