Turquoise is a basic phosphate of copper and aluminum, also contains phosphorus, hydrogen and oxygen. Triclinic, secondary. From green to blue depending on the source. It is the stone of fate. It is balancing and stimulating. Lithotherapy books also say that turquoise protects against external influences and that it helps to control happiness and unhappiness and to identify the causes. Rheumatism, gout, cramps and gastric disorder, but above all it balances the nervous system. Less blue than American or Chinese turquoises, African turquoise is just as effective, if not more, because it is versatile and purifies psychological tensions.