Turquoise deposits in all probability form in more than one way.[fourteen] However, a standard turquoise deposit commences with hydrothermal deposition of copper sulfides. This can take place when hydrothermal fluids leach copper from a host rock, which is usually an intrusion of calc-alkaline rock with a average to high silica https://www.gemsbiz.com/blog/explore/the-december-birthstone-zircon-tanzanite-turquoise