The most common colour is green, an excellent heart chakra stone. “[Aventurine] is used primarily at the heart chakra to both activate and clear. It is also an excellent protector of the heart chakra, providing a shield to block entry from those who wish to “tap in” and use the energy of another”. All colours balance yin-yang energies and help align all the subtle bodies. Yellow is an exceptional 3rd (emotional) chakra stone. Used in medicine wheel ceremonies, where it is often held in the region of the heart. Has been used in disorders of the lungs, heart, adrenals and muscular system.