This is a copper-based mineral, which contains variable amounts of silica and other elements as inclusions. It is commonly found in Zaire, Mexico, Chile and the USA. The colour ranges from blue to turquoise. The stone releases stress and are balancing to the emotions and the mind. It strengthens the lungs and thyroid, reduces anger, stress or fear and increases our capacity to love others. Helps prevent ulcers, aids digestive problems and arthritic conditions.