Malachite

Malachite is a stone of amplification, boosting both positive and negative energies and grounding those energies into the planet. Malachite is an important stone for protection, absorbing negative energies and pollutants, and should be cleansed regularly. This stone can be used to clear and activate any chakra and helps with attuning to spiritual guidance. Known as the stone of transformation, Malachite encourages change and shows what is blocking your growth. It can help with breaking unwanted patterns and ties that no longer serve you, and facilitates deep emotional healing. 

Note: Malachite is safe in polished form but its considered toxic and care should be used not to breathe in it's dust. It is not suitable for work where it would come in contact with food.