Peruvian Opal is the national stone of Peru and it is relatively rare and can only be found in the Andes mountains. Its internal crystalline composition is random, meaning this gemstone lacks the colour play or fire of a usual Opal.  It is said to release tension and to bring peacefulness. It is recommended for the people who tend to have stress and worries. Blue Opal is believed to increase self-confidence. Peruvian opal is found in wonderful pastel blues, greens and pinks.