Green Amethyst is closely related to both amethyst and Citrine. It acts as a bridge between the solar plexus chakra (seat of the will), the heart chakra, and the third eye and crown chakras. This makes it ideal for aligning the body, mind, and spirit into one frequency. 
If you are dedicated to pursuing a spiritual life, you may have found that you are far more able to be loving in a theoretical way while on the meditation cushion than to act loving when someone cuts you off in traffic or drinks the last of the juice. Prasiolite can help bridge this disconnect and translate your spiritual growth into real life peace & connection by activating the heart as the leader of both your thoughts and actions.
Prasiolite also facilitates a stronger connection to nature. If you want to be an advocate for the environment, but you would rather lead with wisdom and heart rather than pure “warrior energy”, prasiolite is an ideal ally.