The nine turquoise mosaics from Mexico are some the most striking pieces in the collections of the British Museum. Among the few surviving such artifacts, these exquisite objects include two masks, a shield, a knife, a helmet, a double-headed serpent, a mosaic on a human skull, a jaguar, and an animal head. They all originate from the Mixtec and Aztec civilizations first encountered by Europeans during the Spanish conquest in the early sixteenth century...