For the Dine' people (Navajo) who live on the high desert and mountain Colorado Plateau (5,000-8,000 ft) in the Four Corner's area of the American Southwest turquoise is a very symbolically important gem.
For the Navajo there are four sacred mountains that mark the boundaries of Dine bikeyah (Navajo lands) and two center ones. Each mountain and cardinal direction with it, has a color associated with it. Each mountain has a sacred gem, a gender. a time of day, season of the year, period of life and philisophical meaning asscociated with it.