Turquoise Mountain turquoise is a desirable American gemstone from the Cerbat Mountains in Mohave County, Arizona, mined as a byproduct of copper and gold operations. Known for its versatility, the stone's colors range from light to deep blue, sometimes with a greenish hue. A notable characteristic is its intricate matrix, which can appear as brown, black, golden, or "water web" (turquoise-colored veining). The mine was heavily worked in the 1970s, closed in the 1980s, and has seen recent, limited production. High-grade natural pieces are hard and sought after for fine jewelry, particularly in Native American designs, due to their distinct look.