Harmonisers are a tool to use whilst in meditation to help align, centre and balance the body's energy flow.  They help to ground you and bring in a sense of peace and calm
 
Agate is a stone of strength, protection and courage.  It brings in balance, inner calm, harmony and emotional healing by alleviating any anxiety, stress or tension you may feel.  It helps to enhance mental functionality and acuity while also keeping your heart clear.  It aids in stabilising the aura by eliminating and transforming negative energies 
 
Chakra: Third Eye & Crown