This is a good-sized Malachite specimen from China.  The rich, green color is very soothing to the eyes.  Metaphysically, "Malachite is very useful in physical healing, as it can alter the patterning of any of the energy bodies.  It isolates the distortion or shadow in the light system that is responsible for a particular physical manifestation and actually draws the energy of the disharmony into and through its own energy vibration."  This is quite a powerful healing tool for energy workers.