Quetzalcoatlite is a rare tellurium oxysalt mineral with the formula Zn6Cu3(TeO6)2(OH)6 · AgxPbyClx+2y. It also contains large amounts of silver with the formula Ag It has a Moh's hardness of 3 and it crystallizes in the trigonal system. It has a deep blue color. It was named after Quetzalcoatl god of the sea, alluding to its color. It is not to be confused with tlalocite , which has a similar color and habit.