Common Opal: SiO2 · H2O Mohs: 5.5 to 6.5 source: Antananarivo Province, Madagascar Pistachio Opal is also known as Green Opal or Kiwi Opal. It gives us an energy boost when we need it as well as enhancing our feelings of self-worth and self-esteem. It makes us more confident and helps us to achieve our full potential. Pistachio Opal can help to dispel stress, fear, tension, anxiety, and depression. It replaces these negative feelings with feelings of love, calmness, relaxation, and awareness. Pistachio Opal is also helpful to those with strong empathic abilities as it can help to buffer the effects of being in groups or meetings. It helps by differentiating your own emotions from those around you.