Green aventurine is universal healer on all levels – it heals the body, mind, soul and heart. Very good stone to balance heart chakra, also all kinds of allergies – in that case wear constantly in contact with skin, at least for a month. Aventurine is also on of the most powerful stones of abundance. Carry in wallet or but it in the abundance corner at home (left back corner, looked at the doorway).
Flat stone suits the best for healingwork, because it covers the chakra and the contact surface are is the largest. Also it will not fall off the body and is large enough to draw forth energetic and physical changes. Flat stones are also the best to carry in your pocket.