be the minerals pyrite( sulphide with metallic lustre) or chalcopyrite( copper iron sulphide) that

A number of the Aztecs ancient relics remain dotted around Mexico.... It is here that the city of Teotihuacan stands, a vast archaeological complex, northeast of the country's capital, Mexico City.... A once flourishing pre-Columbian era settlement, a striking street called the" Avenue of the Dead" pierces the heart of Teotihuacan, leading to the Temple of Quetzalcoatl, the Pyramid of the Moon and the Pyramid of the Sun, the latter two with panoramic views from their summits.It is within these